CVE-2026-76641

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.

expat is a stream-oriented XML parser library written in C. expat excels with files too large to fit RAM, and where performance and flexibility are crucial.

Security Fix(es):

Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementType->defaultAtts to determine CDATA status. A remote unauthenticated attacker can supply a single well-formed XML document of a few megabytes to an application parsing untrusted XML to cause excessive CPU consumption, resulting in denial of service without requiring authentication, external entity resolution, or non-default parser options.(CVE-2026-66046)

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.(CVE-2026-76641)

libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.(CVE-2026-76957)

expat is a stream-oriented XML parser library written in C. expat excels with files too large to fit RAM, and where performance and flexibility are crucial.

Security Fix(es):

Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementType->defaultAtts to determine CDATA status. A remote unauthenticated attacker can supply a single well-formed XML document of a few megabytes to an application parsing untrusted XML to cause excessive CPU consumption, resulting in denial of service without requiring authentication, external entity resolution, or non-default parser options.(CVE-2026-66046)

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.(CVE-2026-76641)

libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.(CVE-2026-76957)

expat is a stream-oriented XML parser library written in C. expat excels with files too large to fit RAM, and where performance and flexibility are crucial.

Security Fix(es):

Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementType->defaultAtts to determine CDATA status. A remote unauthenticated attacker can supply a single well-formed XML document of a few megabytes to an application parsing untrusted XML to cause excessive CPU consumption, resulting in denial of service without requiring authentication, external entity resolution, or non-default parser options.(CVE-2026-66046)

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.(CVE-2026-76641)

libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.(CVE-2026-76957)

expat is a stream-oriented XML parser library written in C. expat excels with files too large to fit RAM, and where performance and flexibility are crucial.

Security Fix(es):

Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementType->defaultAtts to determine CDATA status. A remote unauthenticated attacker can supply a single well-formed XML document of a few megabytes to an application parsing untrusted XML to cause excessive CPU consumption, resulting in denial of service without requiring authentication, external entity resolution, or non-default parser options.(CVE-2026-66046)

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.(CVE-2026-76641)

libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.(CVE-2026-76957)

expat is a stream-oriented XML parser library written in C. expat excels with files too large to fit RAM, and where performance and flexibility are crucial.

Security Fix(es):

Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementType->defaultAtts to determine CDATA status. A remote unauthenticated attacker can supply a single well-formed XML document of a few megabytes to an application parsing untrusted XML to cause excessive CPU consumption, resulting in denial of service without requiring authentication, external entity resolution, or non-default parser options.(CVE-2026-66046)

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.(CVE-2026-76641)

libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.(CVE-2026-76957)

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.

• SECURITY UPDATE: denial of service through quadratic runtime in the default-attribute lookup performed by storeAtts()
  • debian/patches/CVE-2026-66046.patch: resolve whether an attribute is declared CDATA through the per-element defaultAttsNames hash table instead of a linear scan of defaultAtts in expat/lib/xmlparse.c
  • CVE-2026-66046
• SECURITY UPDATE: out-of-bounds read of .attIndex in storeAtts() for parsers created by XML_ExternalEntityParserCreate()
  • debian/patches/CVE-2026-76641.patch: make dtdCopy() create the defaultAttsNames entries with the size of NAME_AND_DEFAULT_ATTRIBUTE and carry the attribute index over in expat/lib/xmlparse.c
  • CVE-2026-76641
• SECURITY UPDATE: malformed UTF-16 accepted because a high surrogate was not required to be followed by a low surrogate
  • debian/patches/CVE-2026-93990.patch: reject a UTF-16 high surrogate whose second code unit is not a low surrogate in the little2_ and big2_ tokenizers in expat/lib/xmltok.c and expat/lib/xmltok_impl.c
  • CVE-2026-93990

• CVE-2026-76641: already fixed by Patch119, which includes upstream 98599f6d (correct dtdCopy sizing of defaultAttForName entries); declare it

• CVE-2026-76641: already fixed by Patch119, which includes upstream 98599f6d (correct dtdCopy sizing of defaultAttForName entries); declare it

• CVE-2026-76641: already fixed by Patch119, which includes upstream 98599f6d (correct dtdCopy sizing of defaultAttForName entries); declare it

Expat Denial of Service via storeAtts() Quadratic Complexity. (CVE-2026-66046) Expat Out-of-Bounds Read via dtdCopy. (CVE-2026-76641) In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content. (CVE-2026-76956) libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. (CVE-2026-76957)

These are all security issues fixed in the expat-2.8.4-1.1 package on the GA media of openSUSE Tumbleweed.

This update for expat fixes the following issues:

• CVE-2026-41080: crafted XML document can cause a denial of service (bsc#1262263).
• CVE-2026-45186: In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input (bsc#1264713).
• CVE-2026-50219: libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation (bsc#1267631).
• CVE-2026-56131: libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation (bsc#1268572).
• CVE-2026-56132: mishandled memory reallocation during array scaffolding in doProlog can cause heap-based buffer overflows (bsc#1268573).
• CVE-2026-56403: integer overflow in the storeAtts function can cause memory corruption and potential arbitrary code execution (bsc#1275096).
• CVE-2026-56404: integer overflow in the addBinding function can cause undersized memory allocations, memory corruption, and application crashes (bsc#1275096).
• CVE-2026-56405: integer overflow in the getAttributeId function can cause heap memory corruption and arbitrary code execution (bsc#1275096).
• CVE-2026-56406: missing bounds validation in XML_ParseBuffer can cause integer overflows, memory corruption, and application crashes (bsc#1275096).
• CVE-2026-56407: integer overflow in doProlog related to entity text length can cause memory corruption and denial of service (bsc#1275096).
• CVE-2026-56408: integer overflow in the copyString function can cause heap memory corruption and application crashes (bsc#1275096).
• CVE-2026-56409: integer overflow in the xmlwf utility output filename handling can allow path buffer corruption and arbitrary file write conditions (bsc#1275096).
• CVE-2026-56410: integer overflow in resolveSystemId within the xmlwf utility can cause memory corruption, information disclosure, and potential code execution (bsc#1275096).
• CVE-2026-56411: integer overflow in endDoctypeDecl via NOTATION declarations in xmlwf can cause memory corruption and denial of service (bsc#1275096).
• CVE-2026-56412: incomplete handler call depth tracking in doCdataSection can cause use-after-free conditions and arbitrary code execution (bsc#1275096).
• CVE-2026-66046: libexpat: denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c (bsc#1275732).
• CVE-2026-72522: libexpat: out-of-bounds read and resultant infinite loop due to low surrogates being treated the same as high surrogates during Unicode processing (bsc#1275594).
• CVE-2026-76641: Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption (bsc#1275915).
• CVE-2026-76956: In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted X (bsc#1275860).
• CVE-2026-76957: libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. (bsc#1275859).

Changes for expat:

• Updated to version 2.8.4

This update for MozillaFirefox fixes the following issues: Firefox Extended Support Release 153.5.0 ESR (MFSA 2026-108, bsc#1284493):

• CVE-2026-109704: Privilege escalation in the Application Update component.
• CVE-2026-109705: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component.
• CVE-2026-109706: Use-after-free in the Storage: IndexedDB component.
• CVE-2026-109707: Sandbox escape due to use-after-free in the Networking component.
• CVE-2026-109708: Sandbox escape due to incorrect boundary conditions in the Networking component.
• CVE-2026-109709: Information disclosure, privilege escalation in the Security: Process Sandboxing component.
• CVE-2026-109710: Use-after-free in the Graphics: Text component.
• CVE-2026-109711: Use-after-free in the Graphics: Canvas2D component.
• CVE-2026-109712: Sandbox escape due to uninitialized memory in the Graphics component.
• CVE-2026-109713: Use-after-free in the Crash Reporting component.
• CVE-2026-109715: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109716: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109717: Use-after-free in the DOM: Bindings (WebIDL) component.
• CVE-2026-109718: Use-after-free in the XML component.
• CVE-2026-109719: Race condition, use-after-free in the Graphics: CanvasWebGL component.
• CVE-2026-109720: JIT miscompilation in the JavaScript: WebAssembly component.
• CVE-2026-109721: Incorrect boundary conditions in the JavaScript Engine: JIT component.
• CVE-2026-109722: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109723: Integer overflow in the Layout: Text and Fonts component.
• CVE-2026-109724: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109725: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109726: Use-after-free in the SVG component.
• CVE-2026-109727: Use-after-free in the Audio/Video component.
• CVE-2026-109728: Use-after-free in the DOM: Animation component.
• CVE-2026-109729: Use-after-free in the JavaScript Engine: JIT component.
• CVE-2026-109730: Integer overflow in the Graphics component.
• CVE-2026-109731: Incorrect boundary conditions in the Graphics: Canvas2D component.
• CVE-2026-109732: Use-after-free in the DOM: Streams component.
• CVE-2026-109733: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109734: Mitigation bypass in the DOM: Security component.
• CVE-2026-109736: Frame poisoning in the Layout component.
• CVE-2026-109737: Mitigation bypass in the Enterprise Policies component.
• CVE-2026-109738: Use-after-free in the Audio/Video: Playback component.
• CVE-2026-109740: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
• CVE-2026-109741: Use-after-free in the Storage: Bucket File System component.
• CVE-2026-109742: Information disclosure in the PDF Viewer component.
• CVE-2026-109743: Privilege escalation in the Panning and Zooming component.
• CVE-2026-109744: Other issue in the DOM: File component.
• CVE-2026-109745: Sandbox escape due to uninitialized memory in the DOM: Web Serial component.
• CVE-2026-109751: Information disclosure in the Networking component.
• CVE-2026-109752: Use-after-free in the DOM: Workers component.
• CVE-2026-109753: Incorrect boundary conditions in the Layout component.
• CVE-2026-109754: Incorrect boundary conditions in the DOM: Editor component.
• CVE-2026-109756: Privilege escalation in the DOM: Navigation component.
• CVE-2026-109757: Sandbox escape due to race condition in the Networking component.
• CVE-2026-109759: Site isolation issue in the Networking component.
• CVE-2026-109760: Mitigation bypass in the Networking: HTTP component.
• CVE-2026-109762: Incorrect boundary conditions in the SVG component.
• CVE-2026-109763: Mitigation bypass in the File Handling component.
• CVE-2026-109764: Mitigation bypass in the Enterprise Policies component. -…

This update for expat fixes the following issues:

• CVE-2026-41080: crafted XML document can cause a denial of service (bsc#1262263).
• CVE-2026-45186: In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input (bsc#1264713).
• CVE-2026-50219: libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation (bsc#1267631).
• CVE-2026-56131: libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation (bsc#1268572).
• CVE-2026-56132: mishandled memory reallocation during array scaffolding in doProlog can cause heap-based buffer overflows (bsc#1268573).
• CVE-2026-56403: integer overflow in the storeAtts function can cause memory corruption and potential arbitrary code execution (bsc#1275096).
• CVE-2026-56404: integer overflow in the addBinding function can cause undersized memory allocations, memory corruption, and application crashes (bsc#1275096).
• CVE-2026-56405: integer overflow in the getAttributeId function can cause heap memory corruption and arbitrary code execution (bsc#1275096).
• CVE-2026-56406: missing bounds validation in XML_ParseBuffer can cause integer overflows, memory corruption, and application crashes (bsc#1275096).
• CVE-2026-56407: integer overflow in doProlog related to entity text length can cause memory corruption and denial of service (bsc#1275096).
• CVE-2026-56408: integer overflow in the copyString function can cause heap memory corruption and application crashes (bsc#1275096).
• CVE-2026-56409: integer overflow in the xmlwf utility output filename handling can allow path buffer corruption and arbitrary file write conditions (bsc#1275096).
• CVE-2026-56410: integer overflow in resolveSystemId within the xmlwf utility can cause memory corruption, information disclosure, and potential code execution (bsc#1275096).
• CVE-2026-56411: integer overflow in endDoctypeDecl via NOTATION declarations in xmlwf can cause memory corruption and denial of service (bsc#1275096).
• CVE-2026-56412: incomplete handler call depth tracking in doCdataSection can cause use-after-free conditions and arbitrary code execution (bsc#1275096).
• CVE-2026-66046: libexpat: denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c (bsc#1275732).
• CVE-2026-72522: libexpat: out-of-bounds read and resultant infinite loop due to low surrogates being treated the same as high surrogates during Unicode processing (bsc#1275594).
• CVE-2026-76641: Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption (bsc#1275915).
• CVE-2026-76956: In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted X (bsc#1275860).
• CVE-2026-76957: libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. (bsc#1275859).

Changes for expat:

• Updated to version 2.8.4

This update for expat fixes the following issues:

• CVE-2026-41080: crafted XML document can cause a denial of service (bsc#1262263).
• CVE-2026-45186: In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input (bsc#1264713).
• CVE-2026-50219: libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation (bsc#1267631).
• CVE-2026-56131: libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation (bsc#1268572).
• CVE-2026-56132: mishandled memory reallocation during array scaffolding in doProlog can cause heap-based buffer overflows (bsc#1268573).
• CVE-2026-56403: integer overflow in the storeAtts function can cause memory corruption and potential arbitrary code execution (bsc#1275096).
• CVE-2026-56404: integer overflow in the addBinding function can cause undersized memory allocations, memory corruption, and application crashes (bsc#1275096).
• CVE-2026-56405: integer overflow in the getAttributeId function can cause heap memory corruption and arbitrary code execution (bsc#1275096).
• CVE-2026-56406: missing bounds validation in XML_ParseBuffer can cause integer overflows, memory corruption, and application crashes (bsc#1275096).
• CVE-2026-56407: integer overflow in doProlog related to entity text length can cause memory corruption and denial of service (bsc#1275096).
• CVE-2026-56408: integer overflow in the copyString function can cause heap memory corruption and application crashes (bsc#1275096).
• CVE-2026-56409: integer overflow in the xmlwf utility output filename handling can allow path buffer corruption and arbitrary file write conditions (bsc#1275096).
• CVE-2026-56410: integer overflow in resolveSystemId within the xmlwf utility can cause memory corruption, information disclosure, and potential code execution (bsc#1275096).
• CVE-2026-56411: integer overflow in endDoctypeDecl via NOTATION declarations in xmlwf can cause memory corruption and denial of service (bsc#1275096).
• CVE-2026-56412: incomplete handler call depth tracking in doCdataSection can cause use-after-free conditions and arbitrary code execution (bsc#1275096).
• CVE-2026-66046: libexpat: denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c (bsc#1275732).
• CVE-2026-72522: libexpat: out-of-bounds read and resultant infinite loop due to low surrogates being treated the same as high surrogates during Unicode processing (bsc#1275594).
• CVE-2026-76641: Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption (bsc#1275915).
• CVE-2026-76956: In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted X (bsc#1275860).
• CVE-2026-76957: libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. (bsc#1275859).

Changes for expat:

• Updated to version 2.8.4

This update for MozillaFirefox fixes the following issues: Firefox Extended Support Release 153.5.0 ESR (MFSA 2026-108, bsc#1284493):

• CVE-2026-109704: Privilege escalation in the Application Update component.
• CVE-2026-109705: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component.
• CVE-2026-109706: Use-after-free in the Storage: IndexedDB component.
• CVE-2026-109707: Sandbox escape due to use-after-free in the Networking component.
• CVE-2026-109708: Sandbox escape due to incorrect boundary conditions in the Networking component.
• CVE-2026-109709: Information disclosure, privilege escalation in the Security: Process Sandboxing component.
• CVE-2026-109710: Use-after-free in the Graphics: Text component.
• CVE-2026-109711: Use-after-free in the Graphics: Canvas2D component.
• CVE-2026-109712: Sandbox escape due to uninitialized memory in the Graphics component.
• CVE-2026-109713: Use-after-free in the Crash Reporting component.
• CVE-2026-109715: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109716: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109717: Use-after-free in the DOM: Bindings (WebIDL) component.
• CVE-2026-109718: Use-after-free in the XML component.
• CVE-2026-109719: Race condition, use-after-free in the Graphics: CanvasWebGL component.
• CVE-2026-109720: JIT miscompilation in the JavaScript: WebAssembly component.
• CVE-2026-109721: Incorrect boundary conditions in the JavaScript Engine: JIT component.
• CVE-2026-109722: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109723: Integer overflow in the Layout: Text and Fonts component.
• CVE-2026-109724: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109725: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109726: Use-after-free in the SVG component.
• CVE-2026-109727: Use-after-free in the Audio/Video component.
• CVE-2026-109728: Use-after-free in the DOM: Animation component.
• CVE-2026-109729: Use-after-free in the JavaScript Engine: JIT component.
• CVE-2026-109730: Integer overflow in the Graphics component.
• CVE-2026-109731: Incorrect boundary conditions in the Graphics: Canvas2D component.
• CVE-2026-109732: Use-after-free in the DOM: Streams component.
• CVE-2026-109733: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109734: Mitigation bypass in the DOM: Security component.
• CVE-2026-109736: Frame poisoning in the Layout component.
• CVE-2026-109737: Mitigation bypass in the Enterprise Policies component.
• CVE-2026-109738: Use-after-free in the Audio/Video: Playback component.
• CVE-2026-109740: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
• CVE-2026-109741: Use-after-free in the Storage: Bucket File System component.
• CVE-2026-109742: Information disclosure in the PDF Viewer component.
• CVE-2026-109743: Privilege escalation in the Panning and Zooming component.
• CVE-2026-109744: Other issue in the DOM: File component.
• CVE-2026-109745: Sandbox escape due to uninitialized memory in the DOM: Web Serial component.
• CVE-2026-109751: Information disclosure in the Networking component.
• CVE-2026-109752: Use-after-free in the DOM: Workers component.
• CVE-2026-109753: Incorrect boundary conditions in the Layout component.
• CVE-2026-109754: Incorrect boundary conditions in the DOM: Editor component.
• CVE-2026-109756: Privilege escalation in the DOM: Navigation component.
• CVE-2026-109757: Sandbox escape due to race condition in the Networking component.
• CVE-2026-109759: Site isolation issue in the Networking component.
• CVE-2026-109760: Mitigation bypass in the Networking: HTTP component.
• CVE-2026-109762: Incorrect boundary conditions in the SVG component.
• CVE-2026-109763: Mitigation bypass in the File Handling component.
• CVE-2026-109764: Mitigation bypass in the Enterprise Policies component. -…

This update for expat fixes the following issues:

• CVE-2025-59375: denial of service (resource consumption) caused by processing malformed small documents (bsc#1249584).
• CVE-2026-24515: NULL dereference (CWE-476) due to function XML_ExternalEntityParserCreate() failing to copy the encoding handler data passed to XML_SetUnknownEncodingHandler() from the parent to the subparser (bsc#1257144).
• CVE-2026-25210: lack of buffer size check can lead to an integer overflow (bsc#1257496).
• CVE-2026-32776: NULL pointer dereference when processing empty external parameter entities inside an entity declaration value (bsc#1259726).
• CVE-2026-32777: denial of service due to infinite loop in DTD content parsing (bsc#1259711).
• CVE-2026-32778: NULL pointer dereference in setContext on retry after an out-of-memory condition (bsc#1259729).
• CVE-2026-41080: crafted XML document can cause a denial of service (bsc#1262263).
• CVE-2026-45186: denial of service via moderately sized crafted XML input (bsc#1264713).
• CVE-2026-50219: lack of handler call depth tracking for calls to XML_* functions from within handlers in cases of a policy violation (bsc#1267631).
• CVE-2026-56131: lack of handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation (bsc#1268572).
• CVE-2026-56132: heap-based buffer overflow in doProlog in xmlparse.c (bsc#1268573).
• CVE-2026-56403,CVE-2026-56404,CVE-2026-56405,CVE-2026-56406, CVE-2026-56407,CVE-2026-56408,CVE-2026-56409,CVE-2026-56410, CVE-2026-56411,CVE-2026-56412: multiple integer overflow vulnerabilities (bsc#1275115).
• CVE-2026-66046: denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function (bsc#1275732).
• CVE-2026-72522: out-of-bounds read and resultant infinite loop due to low surrogates being treated the same as high surrogates during Unicode processing (bsc#1275594).
• CVE-2026-76641: out-of-bounds read vulnerability that allows attackers to trigger memory corruption (bsc#1275915).
• CVE-2026-76956: denial of service via hash flooding attacks (bsc#1275860).
• CVE-2026-76957: lack of handler call depth tracking with custom encoding callbacks. Thus, a use- after-free can occur (bsc#1275859).
• CVE-2026-77214: out-of-bounds read due to insufficient checks in XML_ParseBuffer() (bsc#1284334).
• CVE-2026-93990: fails to validate low surrogates following high surrogates in UTF-16 input (bsc#1282347).
• CVE-2026-102633: Denial of Service via integer overflow in expat_realloc (bsc#1283493).

Update to 2.8.5 (jsc#PED-16154):

• Bug fixes:
• Fix an OOM-related memory leak on a failed overflow check
• Fix memory alignment for architectures with 128bit pointers
• Mark XML_SetHashSalt deprecated
• CMake: only add /source-charset:utf-8 when /utf-8 is not present
• lib: resolve undefined behavior from overshifting a signed int
• lib: support read-only hash table lookup with non-zero-terminated keys
• lib: use a C99 bool for ENTITY.open
• version info bumped from 13:3:12 to 13:4:12
• fix support for 2+ GiB documents (regression from 2.8.2)
• reject empty version in the XML declaration
• fix printf format for AIX
• CMake|AIX: enable EXPAT_DEV_URANDOM by default
• version info bumped from 13:2:12 to 13:3:12
• Existing API function XML_SetHashSalt is now deprecated
• because of its limitations, and its use should be
• considered a vulnerability. Please either use the new API
• function XML_SetHashSalt16Bytes (with known-high-quality
• entropy input only!) instead, or leave the derivation of
• a 16-bytes hash salt from high quality entropy to Expat's
• internal machinery (by not calling either of the two
• XML_SetHashSalt* functions).
• xmlwf: Fix a memory leak
• WASI: Fix format specifiers for 32bit WASI SDK
• Fix alignment of internal allocations for some non-amd64 architectures (e.g. sparc32); fixes up on the fix to CVE-2025-59375 (of Expat 2.7.2)
• Fix a class of…

This update for expat fixes the following issues:

• CVE-2025-59375: denial of service (resource consumption) caused by processing malformed small documents (bsc#1249584).
• CVE-2026-24515: NULL dereference (CWE-476) due to function XML_ExternalEntityParserCreate() failing to copy the encoding handler data passed to XML_SetUnknownEncodingHandler() from the parent to the subparser (bsc#1257144).
• CVE-2026-25210: lack of buffer size check can lead to an integer overflow (bsc#1257496).
• CVE-2026-32776: NULL pointer dereference when processing empty external parameter entities inside an entity declaration value (bsc#1259726).
• CVE-2026-32777: denial of service due to infinite loop in DTD content parsing (bsc#1259711).
• CVE-2026-32778: NULL pointer dereference in setContext on retry after an out-of-memory condition (bsc#1259729).
• CVE-2026-41080: crafted XML document can cause a denial of service (bsc#1262263).
• CVE-2026-45186: denial of service via moderately sized crafted XML input (bsc#1264713).
• CVE-2026-50219: lack of handler call depth tracking for calls to XML_* functions from within handlers in cases of a policy violation (bsc#1267631).
• CVE-2026-56131: lack of handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation (bsc#1268572).
• CVE-2026-56132: heap-based buffer overflow in doProlog in xmlparse.c (bsc#1268573).
• CVE-2026-56403,CVE-2026-56404,CVE-2026-56405,CVE-2026-56406, CVE-2026-56407,CVE-2026-56408,CVE-2026-56409,CVE-2026-56410, CVE-2026-56411,CVE-2026-56412: multiple integer overflow vulnerabilities (bsc#1275115).
• CVE-2026-66046: denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function (bsc#1275732).
• CVE-2026-72522: out-of-bounds read and resultant infinite loop due to low surrogates being treated the same as high surrogates during Unicode processing (bsc#1275594).
• CVE-2026-76641: out-of-bounds read vulnerability that allows attackers to trigger memory corruption (bsc#1275915).
• CVE-2026-76956: denial of service via hash flooding attacks (bsc#1275860).
• CVE-2026-76957: lack of handler call depth tracking with custom encoding callbacks. Thus, a use- after-free can occur (bsc#1275859).
• CVE-2026-77214: out-of-bounds read due to insufficient checks in XML_ParseBuffer() (bsc#1284334).
• CVE-2026-93990: fails to validate low surrogates following high surrogates in UTF-16 input (bsc#1282347).
• CVE-2026-102633: Denial of Service via integer overflow in expat_realloc (bsc#1283493).

Changes for expat:

Update to 2.8.5 (jsc#PED-16154):

• Bug fixes:
• Fix an OOM-related memory leak on a failed overflow check
• Fix memory alignment for architectures with 128bit pointers
• Mark XML_SetHashSalt deprecated
• CMake: only add /source-charset:utf-8 when /utf-8 is not present
• lib: resolve undefined behavior from overshifting a signed int
• lib: support read-only hash table lookup with non-zero-terminated keys
• lib: use a C99 bool for ENTITY.open
• version info bumped from 13:3:12 to 13:4:12
• fix support for 2+ GiB documents (regression from 2.8.2)
• reject empty version in the XML declaration
• fix printf format for AIX
• CMake|AIX: enable EXPAT_DEV_URANDOM by default
• version info bumped from 13:2:12 to 13:3:12
• Existing API function XML_SetHashSalt is now deprecated
• because of its limitations, and its use should be
• considered a vulnerability. Please either use the new API
• function XML_SetHashSalt16Bytes (with known-high-quality
• entropy input only!) instead, or leave the derivation of
• a 16-bytes hash salt from high quality entropy to Expat's
• internal machinery (by not calling either of the two
• XML_SetHashSalt* functions).
• xmlwf: Fix a memory leak
• WASI: Fix format specifiers for 32bit WASI SDK
• Fix alignment of internal allocations for some non-amd64 architectures (e.g. sparc32); fixes up on the fix to CVE-2025-59375 (of Expat 2.7.2) …

This update for expat fixes the following issues:

• CVE-2025-59375: denial of service (resource consumption) caused by processing malformed small documents (bsc#1249584).
• CVE-2026-24515: NULL dereference (CWE-476) due to function XML_ExternalEntityParserCreate() failing to copy the encoding handler data passed to XML_SetUnknownEncodingHandler() from the parent to the subparser (bsc#1257144).
• CVE-2026-25210: lack of buffer size check can lead to an integer overflow (bsc#1257496).
• CVE-2026-32776: NULL pointer dereference when processing empty external parameter entities inside an entity declaration value (bsc#1259726).
• CVE-2026-32777: denial of service due to infinite loop in DTD content parsing (bsc#1259711).
• CVE-2026-32778: NULL pointer dereference in setContext on retry after an out-of-memory condition (bsc#1259729).
• CVE-2026-41080: crafted XML document can cause a denial of service (bsc#1262263).
• CVE-2026-45186: denial of service via moderately sized crafted XML input (bsc#1264713).
• CVE-2026-50219: lack of handler call depth tracking for calls to XML_* functions from within handlers in cases of a policy violation (bsc#1267631).
• CVE-2026-56131: lack of handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation (bsc#1268572).
• CVE-2026-56132: heap-based buffer overflow in doProlog in xmlparse.c (bsc#1268573).
• CVE-2026-56403,CVE-2026-56404,CVE-2026-56405,CVE-2026-56406, CVE-2026-56407,CVE-2026-56408,CVE-2026-56409,CVE-2026-56410, CVE-2026-56411,CVE-2026-56412: multiple integer overflow vulnerabilities (bsc#1275115).
• CVE-2026-66046: denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function (bsc#1275732).
• CVE-2026-72522: out-of-bounds read and resultant infinite loop due to low surrogates being treated the same as high surrogates during Unicode processing (bsc#1275594).
• CVE-2026-76641: out-of-bounds read vulnerability that allows attackers to trigger memory corruption (bsc#1275915).
• CVE-2026-76956: denial of service via hash flooding attacks (bsc#1275860).
• CVE-2026-76957: lack of handler call depth tracking with custom encoding callbacks. Thus, a use- after-free can occur (bsc#1275859).
• CVE-2026-77214: out-of-bounds read due to insufficient checks in XML_ParseBuffer() (bsc#1284334).
• CVE-2026-93990: fails to validate low surrogates following high surrogates in UTF-16 input (bsc#1282347).
• CVE-2026-102633: Denial of Service via integer overflow in expat_realloc (bsc#1283493).

Update to 2.8.5 (jsc#PED-16154):

• Bug fixes:
• Fix an OOM-related memory leak on a failed overflow check
• Fix memory alignment for architectures with 128bit pointers
• Mark XML_SetHashSalt deprecated
• CMake: only add /source-charset:utf-8 when /utf-8 is not present
• lib: resolve undefined behavior from overshifting a signed int
• lib: support read-only hash table lookup with non-zero-terminated keys
• lib: use a C99 bool for ENTITY.open
• version info bumped from 13:3:12 to 13:4:12
• fix support for 2+ GiB documents (regression from 2.8.2)
• reject empty version in the XML declaration
• fix printf format for AIX
• CMake|AIX: enable EXPAT_DEV_URANDOM by default
• version info bumped from 13:2:12 to 13:3:12
• Existing API function XML_SetHashSalt is now deprecated
• because of its limitations, and its use should be
• considered a vulnerability. Please either use the new API
• function XML_SetHashSalt16Bytes (with known-high-quality
• entropy input only!) instead, or leave the derivation of
• a 16-bytes hash salt from high quality entropy to Expat's
• internal machinery (by not calling either of the two
• XML_SetHashSalt* functions).
• xmlwf: Fix a memory leak
• WASI: Fix format specifiers for 32bit WASI SDK
• Fix alignment of internal allocations for some non-amd64 architectures (e.g. sparc32); fixes up on the fix to CVE-2025-59375 (of Expat 2.7.2)
• Fix a class of…

This update for expat fixes the following issues:

• CVE-2025-59375: denial of service (resource consumption) caused by processing malformed small documents (bsc#1249584).
• CVE-2026-24515: NULL dereference (CWE-476) due to function XML_ExternalEntityParserCreate() failing to copy the encoding handler data passed to XML_SetUnknownEncodingHandler() from the parent to the subparser (bsc#1257144).
• CVE-2026-25210: lack of buffer size check can lead to an integer overflow (bsc#1257496).
• CVE-2026-32776: NULL pointer dereference when processing empty external parameter entities inside an entity declaration value (bsc#1259726).
• CVE-2026-32777: denial of service due to infinite loop in DTD content parsing (bsc#1259711).
• CVE-2026-32778: NULL pointer dereference in setContext on retry after an out-of-memory condition (bsc#1259729).
• CVE-2026-41080: crafted XML document can cause a denial of service (bsc#1262263).
• CVE-2026-45186: denial of service via moderately sized crafted XML input (bsc#1264713).
• CVE-2026-50219: lack of handler call depth tracking for calls to XML_* functions from within handlers in cases of a policy violation (bsc#1267631).
• CVE-2026-56131: lack of handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation (bsc#1268572).
• CVE-2026-56132: heap-based buffer overflow in doProlog in xmlparse.c (bsc#1268573).
• CVE-2026-56403,CVE-2026-56404,CVE-2026-56405,CVE-2026-56406, CVE-2026-56407,CVE-2026-56408,CVE-2026-56409,CVE-2026-56410, CVE-2026-56411,CVE-2026-56412: multiple integer overflow vulnerabilities (bsc#1275115).
• CVE-2026-66046: denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function (bsc#1275732).
• CVE-2026-72522: out-of-bounds read and resultant infinite loop due to low surrogates being treated the same as high surrogates during Unicode processing (bsc#1275594).
• CVE-2026-76641: out-of-bounds read vulnerability that allows attackers to trigger memory corruption (bsc#1275915).
• CVE-2026-76956: denial of service via hash flooding attacks (bsc#1275860).
• CVE-2026-76957: lack of handler call depth tracking with custom encoding callbacks. Thus, a use- after-free can occur (bsc#1275859).
• CVE-2026-77214: out-of-bounds read due to insufficient checks in XML_ParseBuffer() (bsc#1284334).
• CVE-2026-93990: fails to validate low surrogates following high surrogates in UTF-16 input (bsc#1282347).
• CVE-2026-102633: Denial of Service via integer overflow in expat_realloc (bsc#1283493).

Update to 2.8.5 (jsc#PED-16154):

• Bug fixes:
• Fix an OOM-related memory leak on a failed overflow check
• Fix memory alignment for architectures with 128bit pointers
• Mark XML_SetHashSalt deprecated
• CMake: only add /source-charset:utf-8 when /utf-8 is not present
• lib: resolve undefined behavior from overshifting a signed int
• lib: support read-only hash table lookup with non-zero-terminated keys
• lib: use a C99 bool for ENTITY.open
• version info bumped from 13:3:12 to 13:4:12
• fix support for 2+ GiB documents (regression from 2.8.2)
• reject empty version in the XML declaration
• fix printf format for AIX
• CMake|AIX: enable EXPAT_DEV_URANDOM by default
• version info bumped from 13:2:12 to 13:3:12
• Existing API function XML_SetHashSalt is now deprecated
• because of its limitations, and its use should be
• considered a vulnerability. Please either use the new API
• function XML_SetHashSalt16Bytes (with known-high-quality
• entropy input only!) instead, or leave the derivation of
• a 16-bytes hash salt from high quality entropy to Expat's
• internal machinery (by not calling either of the two
• XML_SetHashSalt* functions).
• xmlwf: Fix a memory leak
• WASI: Fix format specifiers for 32bit WASI SDK
• Fix a class of false positives where input should have been rejected with error XML_ERROR_ASYNC_ENTITY; regression from earlier security fix (of Expat 2.7.0) …

This update for expat fixes the following issues:

• CVE-2025-59375: denial of service (resource consumption) caused by processing malformed small documents (bsc#1249584).
• CVE-2026-24515: NULL dereference (CWE-476) due to function XML_ExternalEntityParserCreate() failing to copy the encoding handler data passed to XML_SetUnknownEncodingHandler() from the parent to the subparser (bsc#1257144).
• CVE-2026-25210: lack of buffer size check can lead to an integer overflow (bsc#1257496).
• CVE-2026-32776: NULL pointer dereference when processing empty external parameter entities inside an entity declaration value (bsc#1259726).
• CVE-2026-32777: denial of service due to infinite loop in DTD content parsing (bsc#1259711).
• CVE-2026-32778: NULL pointer dereference in setContext on retry after an out-of-memory condition (bsc#1259729).
• CVE-2026-41080: crafted XML document can cause a denial of service (bsc#1262263).
• CVE-2026-45186: denial of service via moderately sized crafted XML input (bsc#1264713).
• CVE-2026-50219: lack of handler call depth tracking for calls to XML_* functions from within handlers in cases of a policy violation (bsc#1267631).
• CVE-2026-56131: lack of handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation (bsc#1268572).
• CVE-2026-56132: heap-based buffer overflow in doProlog in xmlparse.c (bsc#1268573).
• CVE-2026-56403,CVE-2026-56404,CVE-2026-56405,CVE-2026-56406, CVE-2026-56407,CVE-2026-56408,CVE-2026-56409,CVE-2026-56410, CVE-2026-56411,CVE-2026-56412: multiple integer overflow vulnerabilities (bsc#1275115).
• CVE-2026-66046: denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function (bsc#1275732).
• CVE-2026-72522: out-of-bounds read and resultant infinite loop due to low surrogates being treated the same as high surrogates during Unicode processing (bsc#1275594).
• CVE-2026-76641: out-of-bounds read vulnerability that allows attackers to trigger memory corruption (bsc#1275915).
• CVE-2026-76956: denial of service via hash flooding attacks (bsc#1275860).
• CVE-2026-76957: lack of handler call depth tracking with custom encoding callbacks. Thus, a use- after-free can occur (bsc#1275859).
• CVE-2026-77214: out-of-bounds read due to insufficient checks in XML_ParseBuffer() (bsc#1284334).
• CVE-2026-93990: fails to validate low surrogates following high surrogates in UTF-16 input (bsc#1282347).
• CVE-2026-102633: Denial of Service via integer overflow in expat_realloc (bsc#1283493).

Update to 2.8.5 (jsc#PED-16154):

• Bug fixes:
• Fix an OOM-related memory leak on a failed overflow check
• Fix memory alignment for architectures with 128bit pointers
• Mark XML_SetHashSalt deprecated
• CMake: only add /source-charset:utf-8 when /utf-8 is not present
• lib: resolve undefined behavior from overshifting a signed int
• lib: support read-only hash table lookup with non-zero-terminated keys
• lib: use a C99 bool for ENTITY.open
• version info bumped from 13:3:12 to 13:4:12
• fix support for 2+ GiB documents (regression from 2.8.2)
• reject empty version in the XML declaration
• fix printf format for AIX
• CMake|AIX: enable EXPAT_DEV_URANDOM by default
• version info bumped from 13:2:12 to 13:3:12
• Existing API function XML_SetHashSalt is now deprecated
• because of its limitations, and its use should be
• considered a vulnerability. Please either use the new API
• function XML_SetHashSalt16Bytes (with known-high-quality
• entropy input only!) instead, or leave the derivation of
• a 16-bytes hash salt from high quality entropy to Expat's
• internal machinery (by not calling either of the two
• XML_SetHashSalt* functions).
• xmlwf: Fix a memory leak
• WASI: Fix format specifiers for 32bit WASI SDK
• Fix alignment of internal allocations for some non-amd64 architectures (e.g. sparc32); fixes up on the fix to CVE-2025-59375 (of Expat 2.7.2)
• Fix a class of…

This update for MozillaThunderbird fixes the following issues:

Update to Mozilla Thunderbird 153.5 (MFSA 2026-110, bsc#1284493):

• CVE-2026-109704: Privilege escalation in the Application Update component.
• CVE-2026-109705: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component.
• CVE-2026-109706: Use-after-free in the Storage: IndexedDB component.
• CVE-2026-109707: Sandbox escape due to use-after-free in the Networking component.
• CVE-2026-109708: Sandbox escape due to incorrect boundary conditions in the Networking component.
• CVE-2026-109709: Information disclosure, privilege escalation in the Security: Process Sandboxing component.
• CVE-2026-109710: Use-after-free in the Graphics: Text component.
• CVE-2026-109711: Use-after-free in the Graphics: Canvas2D component.
• CVE-2026-109712: Sandbox escape due to uninitialized memory in the Graphics component.
• CVE-2026-109713: Use-after-free in the Crash Reporting component.
• CVE-2026-109715: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109716: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109717: Use-after-free in the DOM: Bindings (WebIDL) component.
• CVE-2026-109718: Use-after-free in the XML component.
• CVE-2026-109719: Race condition, use-after-free in the Graphics: CanvasWebGL component.
• CVE-2026-109720: JIT miscompilation in the JavaScript: WebAssembly component.
• CVE-2026-109721: Incorrect boundary conditions in the JavaScript Engine: JIT component.
• CVE-2026-109722: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109723: Integer overflow in the Layout: Text and Fonts component.
• CVE-2026-109724: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109725: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109726: Use-after-free in the SVG component.
• CVE-2026-109727: Use-after-free in the Audio/Video component.
• CVE-2026-109728: Use-after-free in the DOM: Animation component.
• CVE-2026-109729: Use-after-free in the JavaScript Engine: JIT component.
• CVE-2026-109730: Integer overflow in the Graphics component.
• CVE-2026-109731: Incorrect boundary conditions in the Graphics: Canvas2D component.
• CVE-2026-109732: Use-after-free in the DOM: Streams component.
• CVE-2026-109733: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109734: Mitigation bypass in the DOM: Security component.
• CVE-2026-109736: Frame poisoning in the Layout component.
• CVE-2026-109737: Mitigation bypass in the Enterprise Policies component.
• CVE-2026-109738: Use-after-free in the Audio/Video: Playback component.
• CVE-2026-109740: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
• CVE-2026-109741: Use-after-free in the Storage: Bucket File System component.
• CVE-2026-109742: Information disclosure in the PDF Viewer component.
• CVE-2026-109743: Privilege escalation in the Panning and Zooming component.
• CVE-2026-109744: Other issue in the DOM: File component.
• CVE-2026-109745: Sandbox escape due to uninitialized memory in the DOM: Web Serial component.
• CVE-2026-109751: Information disclosure in the Networking component.
• CVE-2026-109752: Use-after-free in the DOM: Workers component.
• CVE-2026-109753: Incorrect boundary conditions in the Layout component.
• CVE-2026-109754: Incorrect boundary conditions in the DOM: Editor component.
• CVE-2026-109756: Privilege escalation in the DOM: Navigation component.
• CVE-2026-109757: Sandbox escape due to race condition in the Networking component.
• CVE-2026-109759: Site isolation issue in the Networking component.
• CVE-2026-109760: Mitigation bypass in the Networking: HTTP component.
• CVE-2026-109762: Incorrect boundary conditions in the SVG component.
• CVE-2026-109763: Mitigation bypass in the File Handling component.
• CVE-2026-109764: Mitigation bypass in the Enterprise Policies component. -…

This update for MozillaFirefox fixes the following issues:

Firefox Extended Support Release 153.5.0 ESR (MFSA 2026-108, bsc#1284493):

• CVE-2026-109704: Privilege escalation in the Application Update component.
• CVE-2026-109705: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component.
• CVE-2026-109706: Use-after-free in the Storage: IndexedDB component.
• CVE-2026-109707: Sandbox escape due to use-after-free in the Networking component.
• CVE-2026-109708: Sandbox escape due to incorrect boundary conditions in the Networking component.
• CVE-2026-109709: Information disclosure, privilege escalation in the Security: Process Sandboxing component.
• CVE-2026-109710: Use-after-free in the Graphics: Text component.
• CVE-2026-109711: Use-after-free in the Graphics: Canvas2D component.
• CVE-2026-109712: Sandbox escape due to uninitialized memory in the Graphics component.
• CVE-2026-109713: Use-after-free in the Crash Reporting component.
• CVE-2026-109715: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109716: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109717: Use-after-free in the DOM: Bindings (WebIDL) component.
• CVE-2026-109718: Use-after-free in the XML component.
• CVE-2026-109719: Race condition, use-after-free in the Graphics: CanvasWebGL component.
• CVE-2026-109720: JIT miscompilation in the JavaScript: WebAssembly component.
• CVE-2026-109721: Incorrect boundary conditions in the JavaScript Engine: JIT component.
• CVE-2026-109722: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109723: Integer overflow in the Layout: Text and Fonts component.
• CVE-2026-109724: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109725: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109726: Use-after-free in the SVG component.
• CVE-2026-109727: Use-after-free in the Audio/Video component.
• CVE-2026-109728: Use-after-free in the DOM: Animation component.
• CVE-2026-109729: Use-after-free in the JavaScript Engine: JIT component.
• CVE-2026-109730: Integer overflow in the Graphics component.
• CVE-2026-109731: Incorrect boundary conditions in the Graphics: Canvas2D component.
• CVE-2026-109732: Use-after-free in the DOM: Streams component.
• CVE-2026-109733: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109734: Mitigation bypass in the DOM: Security component.
• CVE-2026-109736: Frame poisoning in the Layout component.
• CVE-2026-109737: Mitigation bypass in the Enterprise Policies component.
• CVE-2026-109738: Use-after-free in the Audio/Video: Playback component.
• CVE-2026-109740: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
• CVE-2026-109741: Use-after-free in the Storage: Bucket File System component.
• CVE-2026-109742: Information disclosure in the PDF Viewer component.
• CVE-2026-109743: Privilege escalation in the Panning and Zooming component.
• CVE-2026-109744: Other issue in the DOM: File component.
• CVE-2026-109745: Sandbox escape due to uninitialized memory in the DOM: Web Serial component.
• CVE-2026-109751: Information disclosure in the Networking component.
• CVE-2026-109752: Use-after-free in the DOM: Workers component.
• CVE-2026-109753: Incorrect boundary conditions in the Layout component.
• CVE-2026-109754: Incorrect boundary conditions in the DOM: Editor component.
• CVE-2026-109756: Privilege escalation in the DOM: Navigation component.
• CVE-2026-109757: Sandbox escape due to race condition in the Networking component.
• CVE-2026-109759: Site isolation issue in the Networking component.
• CVE-2026-109760: Mitigation bypass in the Networking: HTTP component.
• CVE-2026-109762: Incorrect boundary conditions in the SVG component.
• CVE-2026-109763: Mitigation bypass in the File Handling component.
• CVE-2026-109764: Mitigation bypass in the Enterprise Policies component. -…

This update for MozillaFirefox fixes the following issues:

Firefox Extended Support Release 153.5.0 ESR (MFSA 2026-108, bsc#1284493):

• CVE-2026-109704: Privilege escalation in the Application Update component.
• CVE-2026-109705: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component.
• CVE-2026-109706: Use-after-free in the Storage: IndexedDB component.
• CVE-2026-109707: Sandbox escape due to use-after-free in the Networking component.
• CVE-2026-109708: Sandbox escape due to incorrect boundary conditions in the Networking component.
• CVE-2026-109709: Information disclosure, privilege escalation in the Security: Process Sandboxing component.
• CVE-2026-109710: Use-after-free in the Graphics: Text component.
• CVE-2026-109711: Use-after-free in the Graphics: Canvas2D component.
• CVE-2026-109712: Sandbox escape due to uninitialized memory in the Graphics component.
• CVE-2026-109713: Use-after-free in the Crash Reporting component.
• CVE-2026-109715: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109716: Incorrect boundary conditions in the JavaScript Engine component.
• CVE-2026-109717: Use-after-free in the DOM: Bindings (WebIDL) component.
• CVE-2026-109718: Use-after-free in the XML component.
• CVE-2026-109719: Race condition, use-after-free in the Graphics: CanvasWebGL component.
• CVE-2026-109720: JIT miscompilation in the JavaScript: WebAssembly component.
• CVE-2026-109721: Incorrect boundary conditions in the JavaScript Engine: JIT component.
• CVE-2026-109722: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109723: Integer overflow in the Layout: Text and Fonts component.
• CVE-2026-109724: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109725: Use-after-free in the DOM: Core & HTML component.
• CVE-2026-109726: Use-after-free in the SVG component.
• CVE-2026-109727: Use-after-free in the Audio/Video component.
• CVE-2026-109728: Use-after-free in the DOM: Animation component.
• CVE-2026-109729: Use-after-free in the JavaScript Engine: JIT component.
• CVE-2026-109730: Integer overflow in the Graphics component.
• CVE-2026-109731: Incorrect boundary conditions in the Graphics: Canvas2D component.
• CVE-2026-109732: Use-after-free in the DOM: Streams component.
• CVE-2026-109733: JIT miscompilation in the JavaScript Engine: JIT component.
• CVE-2026-109734: Mitigation bypass in the DOM: Security component.
• CVE-2026-109736: Frame poisoning in the Layout component.
• CVE-2026-109737: Mitigation bypass in the Enterprise Policies component.
• CVE-2026-109738: Use-after-free in the Audio/Video: Playback component.
• CVE-2026-109740: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
• CVE-2026-109741: Use-after-free in the Storage: Bucket File System component.
• CVE-2026-109742: Information disclosure in the PDF Viewer component.
• CVE-2026-109743: Privilege escalation in the Panning and Zooming component.
• CVE-2026-109744: Other issue in the DOM: File component.
• CVE-2026-109745: Sandbox escape due to uninitialized memory in the DOM: Web Serial component.
• CVE-2026-109751: Information disclosure in the Networking component.
• CVE-2026-109752: Use-after-free in the DOM: Workers component.
• CVE-2026-109753: Incorrect boundary conditions in the Layout component.
• CVE-2026-109754: Incorrect boundary conditions in the DOM: Editor component.
• CVE-2026-109756: Privilege escalation in the DOM: Navigation component.
• CVE-2026-109757: Sandbox escape due to race condition in the Networking component.
• CVE-2026-109759: Site isolation issue in the Networking component.
• CVE-2026-109760: Mitigation bypass in the Networking: HTTP component.
• CVE-2026-109762: Incorrect boundary conditions in the SVG component.
• CVE-2026-109763: Mitigation bypass in the File Handling component.
• CVE-2026-109764: Mitigation bypass in the Enterprise Policies component. -…

It was discovered that Expat did not correctly handle certain integer arithmetic. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-56406, CVE-2026-56407, CVE-2026-56409, CVE-2026-56410, CVE-2026-56411)

It was discovered that Expat did not correctly track handler call depth. An attacker could possibly use this issue to cause Expat to crash or execute arbitrary code. (CVE-2026-56131)

It was discovered that Expat did not correctly handle certain memory operations. An attacker could possibly use this issue to cause Expat to crash or execute arbitrary code. (CVE-2026-56132)

It was discovered that Expat did not correctly handle certain Unicode characters. An attacker could possibly use this issue to cause Expat to use excessive resources, leading to a denial of service. (CVE-2026-72522)

It was discovered that Expat did not correctly process certain XML attributes. A remote attacker could possibly use this issue to cause Expat to use excessive resources, leading to a denial of service. (CVE-2026-66046)

It was discovered that Expat did not correctly handle certain external entities. An attacker could possibly use this issue to cause Expat to crash or execute arbitrary code. (CVE-2026-76641)

It was discovered that Expat did not correctly track handler call depth with custom encodings. An attacker could possibly use this issue to cause Expat to crash or execute arbitrary code. (CVE-2026-76957)