CVE-2025-0938

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.

Security Fix(es):

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.(CVE-2025-0938)

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.

Security Fix(es):

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.(CVE-2025-0938)

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.

Security Fix(es):

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.(CVE-2025-0938)

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.

Security Fix(es):

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.(CVE-2025-0938)

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python: Invalid value for OpenSSL API may cause Buffer over-read when NPN is used (CVE-2024-5642)

• python: Virtual environment (venv) activation scripts don't quote paths (CVE-2024-9287)

• python: Improper validation of IPv6 and IPvFuture addresses (CVE-2024-11168)

• python: cpython: URL parser allowed square brackets in domain names (CVE-2025-0938)

• cpython: python: CPython DecodeError Handling Vulnerability (CVE-2025-4516)

• cpython: Tarfile extracts filtered members when errorlevel=0 (CVE-2025-4435)

• cpython: python: Extraction filter bypass for linking outside extraction directory (CVE-2025-4330)

• python: cpython: Arbitrary writes via tarfile realpath overflow (CVE-2025-4517)

• cpython: python: Bypassing extraction filter to create symlinks to arbitrary targets outside extraction directory (CVE-2025-4138)

• cpython: Python HTMLParser quadratic complexity (CVE-2025-6069)

• cpython: python: Python zipfile End of Central Directory (EOCD) Locator record offset not checked (CVE-2025-8291)

• python: Quadratic complexity in os.path.expandvars() with user-controlled template (CVE-2025-6075)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python: cpython: URL parser allowed square brackets in domain names (CVE-2025-0938)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 9 Release Notes linked from the References section.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python: cpython: URL parser allowed square brackets in domain names (CVE-2025-0938)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 9 Release Notes linked from the References section.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python: cpython: URL parser allowed square brackets in domain names (CVE-2025-0938)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 9 Release Notes linked from the References section.

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python: Invalid value for OpenSSL API may cause Buffer over-read when NPN is used (CVE-2024-5642)
• python: Virtual environment (venv) activation scripts don't quote paths (CVE-2024-9287)
• python: Improper validation of IPv6 and IPvFuture addresses (CVE-2024-11168)
• python: cpython: URL parser allowed square brackets in domain names (CVE-2025-0938)
• cpython: python: CPython DecodeError Handling Vulnerability (CVE-2025-4516)
• cpython: Tarfile extracts filtered members when errorlevel=0 (CVE-2025-4435)
• cpython: python: Extraction filter bypass for linking outside extraction directory (CVE-2025-4330)
• python: cpython: Arbitrary writes via tarfile realpath overflow (CVE-2025-4517)
• cpython: python: Bypassing extraction filter to create symlinks to arbitrary targets outside extraction directory (CVE-2025-4138)
• cpython: Python HTMLParser quadratic complexity (CVE-2025-6069)
• cpython: python: Python zipfile End of Central Directory (EOCD) Locator record offset not checked (CVE-2025-8291)
• python: Quadratic complexity in os.path.expandvars() with user-controlled template (CVE-2025-6075)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python: cpython: URL parser allowed square brackets in domain names (CVE-2025-0938)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinuxRelease Notes linked from the References section.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python: cpython: URL parser allowed square brackets in domain names (CVE-2025-0938)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinuxRelease Notes linked from the References section.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python: cpython: URL parser allowed square brackets in domain names (CVE-2025-0938)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinuxRelease Notes linked from the References section.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python: cpython: URL parser allowed square brackets in domain names (CVE-2025-0938)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.

• CVE-2024-11168: fix improper validation of bracketed hosts in urllib.parse.urlsplit() and urlparse() functions
• CVE-2025-0938: fix incomplete algorithm of validating hosts by disallowing square brackets in domain names

• CVE-2024-11168: fix improper validation of bracketed hosts in urllib.parse.urlsplit() and urlparse() functions
• CVE-2025-0938: fix incomplete algorithm of validating hosts by disallowing square brackets in domain names

• SECURITY UPDATE: Improper validation of bracketed hosts in urllib
  • debian/patches/CVE-2024-11168.patch: add checks to ensure that bracketed hosts found by urlsplit are of IPv6 or IPvFuture format
  • CVE-2024-11168
• SECURITY UPDATE: Incomplete validation of bracketed hosts in urllib
  • debian/patches/CVE-2025-0938.patch: disallow square brackets ([ and ]) in domain names for parsed URLs
  • CVE-2025-0938
• SECURITY UPDATE: Incorrent information about whether certain IPv4 and IPv6 addresses were designated as “globally reachable” or “private” in ipaddress module
  • debian/patches/CVE-2024-4032.patch: fix "private" (non-global) IP address ranges
  • CVE-2024-4032

• CVE-2024-11168: fix improper validation of bracketed hosts in urllib.parse.urlsplit() and urlparse() functions
• CVE-2025-0938: fix incomplete algorithm of validating hosts by disallowing square brackets in domain names

• SECURITY UPDATE: Improper validation of bracketed hosts in urllib
  • debian/patches/CVE-2024-11168.patch: add checks to ensure that bracketed hosts found by urlsplit are of IPv6 or IPvFuture format
  • CVE-2024-11168
• SECURITY UPDATE:Incomplete validation of bracketed hosts in urllib
  • debian/patches/CVE-2025-0938.patch: disallow square brackets ([ and ]) in domain names for parsed URLs
  • CVE-2025-0938

• CVE-2025-0938: disallow square brackets in domain names for parsed URLs to prevent differential URL parsing

• CVE-2025-0938: disallow square brackets in domain names for parsed URLs to prevent differential URL parsing

• CVE-2025-0938: disallow square brackets in domain names for parsed URLs to prevent differential URL parsing

URL parser allowed square brackets in domain names. (CVE-2025-0938) Mishandling of comma during folding and unicode-encoding of email headers. (CVE-2025-1795) Virtual environment (venv) activation scripts don't quote paths. (CVE-2024-9287) Use-after-free in "unicode_escape" decoder with error handler. (CVE-2025-4516) Bypass extraction filter to modify file metadata outside extraction directory. (CVE-2024-12718) Bypassing extraction filter to create symlinks to arbitrary targets outside extraction directory. (CVE-2025-4138) Extraction filter bypass for linking outside extraction directory. (CVE-2025-4330) Tarfile extracts filtered members when errorlevel=0. (CVE-2025-4435) Arbitrary writes via tarfile realpath overflow. (CVE-2025-4517) Tarfile infinite loop during parsing with negative member offset. (CVE-2025-8194)

These are all security issues fixed in the python311-3.11.11-3.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python39-3.9.21-2.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python310-3.10.16-2.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python312-3.12.9-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python313-3.13.2-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python314-3.14.0~a4-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python315-3.15.0~a1-1.1 package on the GA media of openSUSE Tumbleweed.

The Python standard library functions urllib.parse.urlsplit and urlparse accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.

This update for python313 fixes the following issues:

Update to version 3.13.5.

Security issues fixed:

• CVE-2025-4517: arbitrary filesystem writes outside the extraction directory during extraction with filter='data' (bsc#1244032)
• CVE-2025-4516: use-after-free in the unicode-escape decoder when using the error handler (bsc#1243273).
• CVE-2025-4330: extraction filter bypass for linking outside extraction directory (bsc#1244060)
• CVE-2025-4138: may allow symlink targets to point outside the destination directory, and the modification of some file metadata. (bsc#1244059)
• CVE-2025-0938: domain names containing square brackets are not identified as incorrect by urlparse (bsc#1236705).
• CVE-2024-12718: bypass extraction filter to modify file metadata outside extraction directory (bsc#1244056)
• CVE-2024-12254: memory exhaustion due to unbounded memory buffering in SelectorSocketTransport.writelines() (bsc#1234290).

Other changes and issues fixed:

Changes from 3.13.5:

• Tests

  • gh-135120: Add test.support.subTests().

• Library

  • gh-133967: Do not normalize locale name ‘C.UTF-8’ to ‘en_US.UTF-8’.
  • gh-135326: Restore support of integer-like objects with index() in random.getrandbits().
  • gh-135321: Raise a correct exception for values greater than 0x7fffffff for the BINSTRING opcode in the C implementation of pickle.
  • gh-135276: Backported bugfixes in zipfile.Path from zipp 3.23. Fixed .name, .stem and other basename-based properties on Windows when working with a zipfile on disk.
  • gh-134151: email: Fix TypeError in email.utils.decode_params() when sorting RFC 2231 continuations that contain an unnumbered section.
  • gh-134152: email: Fix parsing of email message ID with invalid domain.
  • gh-127081: Fix libc thread safety issues with os by replacing getlogin with getlogin_r re-entrant version.
  • gh-131884: Fix formatting issues in json.dump() when both indent and skipkeys are used.

• Core and Builtins

  • gh-135171: Roll back changes to generator and list comprehensions that went into 3.13.4 to fix gh-127682, but which involved semantic and bytecode changes not appropriate for a bugfix release.

• C API

  • gh-134989: Fix Py_RETURN_NONE, Py_RETURN_TRUE and Py_RETURN_FALSE macros in the limited C API 3.11 and older: don’t treat Py_None, Py_True and Py_False as immortal. Patch by Victor Stinner.
  • gh-134989: Implement PyObject_DelAttr() and PyObject_DelAttrString() as macros in the limited C API 3.12 and older. Patch by Victor Stinner.

Changes from 3.13.4:

• Security

  • gh-135034: Fixes multiple issues that allowed tarfile extraction filters (filter='data' and filter='tar') to be bypassed using crafted symlinks and hard links. Addresses CVE-2024-12718 (bsc#1244056), CVE-2025-4138 (bsc#1244059), CVE-2025-4330 (bsc#1244060), and CVE-2025-4517 (bsc#1244032).
  • gh-133767: Fix use-after-free in the “unicode-escape” decoder with a non-“strict” error handler (CVE-2025-4516, bsc#1243273).
  • gh-128840: Short-circuit the processing of long IPv6 addresses early in ipaddress to prevent excessive memory consumption and a minor denial-of-service.

• Library

  • gh-134718: ast.dump() now only omits None and [] values if they are default values.
  • gh-128840: Fix parsing long IPv6 addresses with embedded IPv4 address.
  • gh-134696: Built-in HACL* and OpenSSL implementations of hash function constructors now correctly accept the same documented named arguments. For instance, md5() could be previously invoked as md5(data=data) or md5(string=string) depending on the underlying implementation but these calls were not compatible. Patch by Bénédikt Tran.
  • gh-134210: curses.window.getch() now correctly handles …

This update for python39 fixes the following issues:

• CVE-2025-0938: domain names containing square brackets are not identified as incorrect by urlparse. (bsc#1236705)