CVE-2026-46729

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.

Security Fix(es):

A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes.

Users are recommended to upgrade to version 2.4.69, which fixes this issue(CVE-2026-42528)

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-46729)

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache HTTP Server's mod_session_cookie module.

 
When SessionCookieRemove changes across internal redirects, the session cookie may still be passed to a backend server.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-47360)

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.

Security Fix(es):

A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes.

Users are recommended to upgrade to version 2.4.69, which fixes this issue(CVE-2026-42528)

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-46729)

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache HTTP Server's mod_session_cookie module.

 
When SessionCookieRemove changes across internal redirects, the session cookie may still be passed to a backend server.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-47360)

Out-of-bounds Write vulnerability in Apache HTTP Server's mod_charset_lite.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-56153)

Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...})

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-56154)

Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-57941)

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.

Security Fix(es):

A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes.

Users are recommended to upgrade to version 2.4.69, which fixes this issue(CVE-2026-42528)

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-46729)

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache HTTP Server's mod_session_cookie module.

 
When SessionCookieRemove changes across internal redirects, the session cookie may still be passed to a backend server.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-47360)

Out-of-bounds Write vulnerability in Apache HTTP Server's mod_charset_lite.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-56153)

Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...})

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-56154)

Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-57941)

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.

Security Fix(es):

A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes.

Users are recommended to upgrade to version 2.4.69, which fixes this issue(CVE-2026-42528)

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-46729)

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache HTTP Server's mod_session_cookie module.

 
When SessionCookieRemove changes across internal redirects, the session cookie may still be passed to a backend server.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-47360)

Out-of-bounds Write vulnerability in Apache HTTP Server's mod_charset_lite.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-56153)

Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...})

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-56154)

Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-57941)

Internal state files accessible to external parties in mod_dav_fs in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows a remote client to read WebDAV dead properties of resources it cannot author via a GET request for the .DAV state directory

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-58415)

Out-of-bounds Write vulnerability in Apache HTTP Server on Windows while processing paths with 8.3 names that may grow when expanded.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-59685)

Improper Privilege Management vulnerability in Apache HTTP Server's mod_ssl via SSLRequire and file-related expressions.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.(CVE-2026-59797)

Improper validation of FTP PASV reply address in mod_proxy_ftp in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows, in forward proxy configurations, an untrusted FTP server to cause the proxy to open a data connection to an arbitrary third-party host via a crafted PASV response.

Users are recommended to upgrade to version 2.4.69, which fixes this issue.(CVE-2026-63045)

Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default.

Users are recommended to upgrade to version 2.4.69, which fixes this issue.(CVE-2026-63292)

A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails.

Users are recommended to upgrade to version 2.4.69, which fixes this issue.(CVE-2026-63686)

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') response smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi and a crafted uwsgi response with Transfer-Encoding.

This issue affects Apache HTTP Server: from 2.4.30 through 2.4.68.(CVE-2026-63718)

Path equivalence: '/./' (single dot directory) vulnerability in Apache HTTP Server's mod_userdir module when configured with absolute non-wildcard UserDir directive (the 2nd…

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

• httpd: httpd: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi (CVE-2026-63718)

• httpd: httpd: Denial of Service via integer overflow in mod_dav_fs (CVE-2026-93546)

• httpd: httpd: Authentication state corruption via concurrent Digest authentication requests (CVE-2026-73637)

• httpd: httpd: unauthorized connection to arbitrary hosts via crafted FTP PASV response (CVE-2026-63045)

• httpd: httpd: Arbitrary code execution via oversized Host header in mod_vhost_alias (CVE-2026-63292)

• httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference (CVE-2026-46729)

• httpd: httpd: Authentication bypass via credential replay in mod_auth_digest (CVE-2026-73636)

• httpd: httpd: Denial of Service via charset conversion failure in mod_xml2enc (CVE-2026-63686)

• httpd: httpd: Denial of service via forged Authorization headers in mod_auth_digest (CVE-2026-48005)

• httpd: httpd: Denial of Service via mod_rewrite lookahead (CVE-2026-56154)

• httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite (CVE-2026-56153)

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 httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

• httpd: httpd: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi (CVE-2026-63718)

• httpd: httpd: Denial of Service via integer overflow in mod_dav_fs (CVE-2026-93546)

• httpd: httpd: Authentication state corruption via concurrent Digest authentication requests (CVE-2026-73637)

• httpd: httpd: unauthorized connection to arbitrary hosts via crafted FTP PASV response (CVE-2026-63045)

• httpd: httpd: Arbitrary code execution via oversized Host header in mod_vhost_alias (CVE-2026-63292)

• httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference (CVE-2026-46729)

• httpd: httpd: Authentication bypass via credential replay in mod_auth_digest (CVE-2026-73636)

• httpd: httpd: Denial of Service via charset conversion failure in mod_xml2enc (CVE-2026-63686)

• httpd: httpd: Denial of service via forged Authorization headers in mod_auth_digest (CVE-2026-48005)

• httpd: httpd: Denial of Service via mod_rewrite lookahead (CVE-2026-56154)

• httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite (CVE-2026-56153)

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 httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

• httpd: mod_auth_digest: timing attack allows a bypass of digest authentication (CVE-2026-33006)

• httpd: httpd: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi (CVE-2026-63718)

• httpd: httpd: Denial of Service via integer overflow in mod_dav_fs (CVE-2026-93546)

• httpd: httpd: Authentication state corruption via concurrent Digest authentication requests (CVE-2026-73637)

• httpd: httpd: unauthorized connection to arbitrary hosts via crafted FTP PASV response (CVE-2026-63045)

• httpd: httpd: Arbitrary code execution via oversized Host header in mod_vhost_alias (CVE-2026-63292)

• httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference (CVE-2026-46729)

• httpd: httpd: Authentication bypass via credential replay in mod_auth_digest (CVE-2026-73636)

• httpd: httpd: Denial of Service via charset conversion failure in mod_xml2enc (CVE-2026-63686)

• httpd: httpd: Denial of service via forged Authorization headers in mod_auth_digest (CVE-2026-48005)

• httpd: httpd: Denial of Service via mod_rewrite lookahead (CVE-2026-56154)

• httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite (CVE-2026-56153)

Bug Fix(es) and Enhancement(s):

• mod_proxy_hcheck: passing health check does not recover worker from its standard error state (PROXY_WORKER_IN_ERROR) (JIRA:Rocky Linux-256797)

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.

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

• httpd: httpd: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi (CVE-2026-63718)
• httpd: httpd: Denial of Service via integer overflow in mod_dav_fs (CVE-2026-93546)
• httpd: httpd: Authentication state corruption via concurrent Digest authentication requests (CVE-2026-73637)
• httpd: httpd: unauthorized connection to arbitrary hosts via crafted FTP PASV response (CVE-2026-63045)
• httpd: httpd: Arbitrary code execution via oversized Host header in mod_vhost_alias (CVE-2026-63292)
• httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference (CVE-2026-46729)
• httpd: httpd: Authentication bypass via credential replay in mod_auth_digest (CVE-2026-73636)
• httpd: httpd: Denial of Service via charset conversion failure in mod_xml2enc (CVE-2026-63686)
• httpd: httpd: Denial of service via forged Authorization headers in mod_auth_digest (CVE-2026-48005)
• httpd: httpd: Denial of Service via mod_rewrite lookahead (CVE-2026-56154)
• httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite (CVE-2026-56153)

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 httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

• httpd: httpd: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi (CVE-2026-63718)
• httpd: httpd: Denial of Service via integer overflow in mod_dav_fs (CVE-2026-93546)
• httpd: httpd: Authentication state corruption via concurrent Digest authentication requests (CVE-2026-73637)
• httpd: httpd: unauthorized connection to arbitrary hosts via crafted FTP PASV response (CVE-2026-63045)
• httpd: httpd: Arbitrary code execution via oversized Host header in mod_vhost_alias (CVE-2026-63292)
• httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference (CVE-2026-46729)
• httpd: httpd: Authentication bypass via credential replay in mod_auth_digest (CVE-2026-73636)
• httpd: httpd: Denial of Service via charset conversion failure in mod_xml2enc (CVE-2026-63686)
• httpd: httpd: Denial of service via forged Authorization headers in mod_auth_digest (CVE-2026-48005)
• httpd: httpd: Denial of Service via mod_rewrite lookahead (CVE-2026-56154)
• httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite (CVE-2026-56153)

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 httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

• httpd: mod_auth_digest: timing attack allows a bypass of digest authentication (CVE-2026-33006)
• httpd: httpd: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi (CVE-2026-63718)
• httpd: httpd: Denial of Service via integer overflow in mod_dav_fs (CVE-2026-93546)
• httpd: httpd: Authentication state corruption via concurrent Digest authentication requests (CVE-2026-73637)
• httpd: httpd: unauthorized connection to arbitrary hosts via crafted FTP PASV response (CVE-2026-63045)
• httpd: httpd: Arbitrary code execution via oversized Host header in mod_vhost_alias (CVE-2026-63292)
• httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference (CVE-2026-46729)
• httpd: httpd: Authentication bypass via credential replay in mod_auth_digest (CVE-2026-73636)
• httpd: httpd: Denial of Service via charset conversion failure in mod_xml2enc (CVE-2026-63686)
• httpd: httpd: Denial of service via forged Authorization headers in mod_auth_digest (CVE-2026-48005)
• httpd: httpd: Denial of Service via mod_rewrite lookahead (CVE-2026-56154)
• httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite (CVE-2026-56153)

Bug Fix(es) and Enhancement(s):

• mod_proxy_hcheck: passing health check does not recover worker from its standard error state (PROXY_WORKER_IN_ERROR) (JIRA:RHEL-256797)

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.

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

• CVE-2026-56153: mod_charset_lite: heap overflow in finish_partial_char
• CVE-2026-46729: mod_heartmonitor: NULL pointer dereference on malformed heartbeat
• CVE-2026-56154: mod_rewrite: use-after-free via LA-U lookahead variables
• CVE-2026-63292: mod_vhost_alias: stack overflow with oversized Host header

• CVE-2026-56153: mod_charset_lite: heap overflow in finish_partial_char
• CVE-2026-46729: mod_heartmonitor: NULL pointer dereference on malformed heartbeat
• CVE-2026-56154: mod_rewrite: use-after-free via LA-U lookahead variables
• CVE-2026-63292: mod_vhost_alias: stack overflow with oversized Host header

• CVE-2026-56153: mod_charset_lite: heap overflow in finish_partial_char
• CVE-2026-46729: mod_heartmonitor: NULL pointer dereference on malformed heartbeat
• CVE-2026-56154: mod_rewrite: use-after-free via LA-U lookahead variables
• CVE-2026-63292: mod_vhost_alias: stack overflow with oversized Host header

• CVE-2026-56153: fix mod_charset_lite heap overflow in finish_partial_char()
• CVE-2026-46729: fix mod_heartmonitor NULL pointer dereference in the heartbeat handler
• CVE-2026-56154: fix mod_rewrite use-after-free via %{LA-U:HTTP:...} lookahead
• CVE-2026-56449: fix mod_proxy_html out-of-bounds write in dump_content()
• CVE-2026-63292: fix mod_vhost_alias stack-based buffer overflow

• CVE-2026-56153: fix mod_charset_lite heap overflow in finish_partial_char
• CVE-2026-46729: fix mod_heartmonitor NULL pointer dereference in the unicast listener
• CVE-2026-56154: fix mod_rewrite use-after-free via LA-U/LA-F lookahead of HTTP headers
• CVE-2026-56449: fix mod_proxy_html crash in dump_content
• CVE-2026-63292: fix mod_vhost_alias stack buffer overflow with long host names

• CVE-2026-56153: fix mod_charset_lite heap overflow in finish_partial_char()
• CVE-2026-46729: fix mod_heartmonitor NULL pointer dereference in the heartbeat handler
• CVE-2026-56154: fix mod_rewrite use-after-free with LA-U/LA-F lookahead of HTTP headers
• CVE-2026-56449: fix mod_proxy_html out-of-bounds write in dump_content()
• CVE-2026-63292: fix mod_vhost_alias stack buffer overflow on overlong host names

• CVE-2026-56153: mod_charset_lite: bound the partial character buffer in finish_partial_char
• CVE-2026-46729: mod_heartmonitor: validate the heartbeat POST body and query
• CVE-2026-56154: mod_rewrite: copy the lookahead Vary value out of the subrequest pool
• CVE-2026-56449: mod_proxy_html: don't dump content when printing a comment
• CVE-2026-63292: mod_vhost_alias: reject host name parts that do not fit the path buffer

• SECURITY UPDATE: mod_charset_lite: heap overflow in finish_partial_char
  • debian/patches/CVE-2026-56153.patch: mod_charset_lite: heap overflow in finish_partial_char
  • CVE-2026-56153
• SECURITY UPDATE: mod_heartmonitor: NULL pointer dereference on malformed heartbeat
  • debian/patches/CVE-2026-46729.patch: mod_heartmonitor: NULL pointer dereference on malformed heartbeat
  • CVE-2026-46729
• SECURITY UPDATE: mod_rewrite: use-after-free via LA-U lookahead variables
  • debian/patches/CVE-2026-56154.patch: mod_rewrite: use-after-free via LA-U lookahead variables
  • CVE-2026-56154
• SECURITY UPDATE: mod_proxy_html: out-of-bounds write in dump_content
  • debian/patches/CVE-2026-56449.patch: mod_proxy_html: out-of-bounds write in dump_content
  • CVE-2026-56449
• SECURITY UPDATE: mod_vhost_alias: stack overflow with oversized Host header
  • debian/patches/CVE-2026-63292.patch: mod_vhost_alias: stack overflow with oversized Host header
  • CVE-2026-63292
• SECURITY UPDATE: mod_proxy_uwsgi: response smuggling via Transfer-Encoding
  • debian/patches/CVE-2026-63718.patch: mod_proxy_uwsgi: response smuggling via Transfer-Encoding
  • CVE-2026-63718
• SECURITY UPDATE: mod_http2: use-after-free via shared session bbtmp re-entrancy
  • debian/patches/CVE-2026-57941.patch: mod_http2: use-after-free via shared session bbtmp re-entrancy
  • CVE-2026-57941

• SECURITY UPDATE: NULL pointer dereference in mod_heartmonitor
  • debian/patches/CVE-2026-46729.patch: reject a heartbeat POST body that lacks the busy or ready parameter with HTTP 400 instead of passing a NULL pointer to atoi() in hm_handler() in modules/cluster/mod_heartmonitor.c.
  • CVE-2026-46729

• SECURITY UPDATE: NULL pointer dereference in mod_heartmonitor
  • debian/patches/CVE-2026-46729.patch: reject heartbeat POSTs that lack the busy or ready parameter or exceed the maximum message length, and parse port, busy and ready with strtol() validation in hm_handler() in modules/cluster/mod_heartmonitor.c.
  • CVE-2026-46729

• SECURITY UPDATE: buffer over-read in mod_ssl OCSP requests
  • debian/patches/CVE-2026-44185.patch: in send_request() in modules/ssl/ssl_util_ocsp.c, advance the write pointer by the number of bytes actually sent instead of the total remaining length so a short write to an attacker controlled OCSP responder can no longer read past the end of the stack buffer. Backported from httpd commit 32b7e2e66477020ba75b78ab43fb8890ec292ad2 (SVN r1934919).
  • CVE-2026-44185
• SECURITY UPDATE: NULL pointer dereference in mod_heartmonitor
  • debian/patches/CVE-2026-46729.patch: in hm_handler() in modules/cluster/mod_heartmonitor.c, reject requests when the module is not active or the body exceeds MAX_MSG_LEN, require the busy and ready parameters, and parse port, busy and ready with strtol() so a crafted unicast heartbeat can no longer dereference a NULL pointer. Backported from httpd commit 7b12a7936ec439b3e1f5fc36cfacf5b915eb652c (SVN r1938654).
  • CVE-2026-46729

Limited RCE for some internal redirects to non-CGI files in CGI directories. (CVE-2026-42356) mod_dav shared lock overflow. (CVE-2026-42528) mod_heartmonitor denial of service. (CVE-2026-46729) mod_session: Session cookie not removed during internal redirect. (CVE-2026-47360) mod_auth_digest reauthentication attack. (CVE-2026-48005) mod_charset_lite: Heap overflow in finish_partial_char. (CVE-2026-56153) mod_rewrite use-after-free via %{LA-U:HTTP:...}. (CVE-2026-56154) mod_proxy_html: crash in dump_content. (CVE-2026-56449) mod_http2 use-after-free / wild write via shared session->bbtmp re-entrancy. (CVE-2026-57941) mod_dav_fs property database read access. (CVE-2026-58415) Out-of-Bounds Write in ap_directory_walk() Canonical-Name Rewrite on CASE_BLIND_FILESYSTEM. (CVE-2026-59685) mod_ssl SSLRequire allows .htaccess ap_expr file-function. (CVE-2026-59797) mod_proxy_ftp PASV address handling. (CVE-2026-63045) mod_vhost_alias stack overflow. (CVE-2026-63292) mod_xml2enc crash on charset conversion failure. (CVE-2026-63686) mod_proxy_uwsgi Transfer-Encoding response smuggling. (CVE-2026-63718) mod_auth_digest one-time-nonce replay attack. (CVE-2026-73636) mod_auth_digest DoS attack. (CVE-2026-73637) mod_userdir information disclosure. (CVE-2026-79768) mod_dav_fs namespace overflow. (CVE-2026-93546)

Root has patched CVE-2026-46729 in the apache2 package for Root:Debian:12. Multiple fixed versions available.

This update for apache2 fixes the following issues:

• CVE-2026-42356: deployment of wrong handler allows target of internal redirects from CGI programs to also be treated as CGI and executed (bsc#1284043).
• CVE-2026-42528: memory calculation bug in mod_dav allows an attacker with permission to create WebDAV locks to crash server child processes (bsc#1284044).
• CVE-2026-46729: NULL pointer dereference in mod_heartmonitor over unicast listener (bsc#1284045).
• CVE-2026-47360: session cookie passed to a backend server when SessionCookieRemove changes across internal redirects (bsc#1284046).
• CVE-2026-48005: missing authentication checks in mod_auth_digest allows an unauthenticated remote client to cause a DoS via forged Authorization headers when Digest authentication is enabled with AuthDigestNcCheck (bsc#1284047).
• CVE-2026-56153: out-of-bounds write in mod_charset_lite (bsc#1284048).
• CVE-2026-56154: use-after-free in mod_rewrite when using lookahead (%{LA-U:HTTP:...}) (bsc#1284049).
• CVE-2026-57941: use-after-free in mod_http2 via shared session->bbtmp re-entrancy (bsc#1284050).
• CVE-2026-58415: internal state files accessible to external parties in mod_dav_fs allows a remote client to read WebDAV dead properties of resources it cannot author via a GET request for the .DAV state directory (bsc#1284051).
• CVE-2026-59797: improper privilege management in mod_ssl when using SSLRequire and file-related expressions (bsc#1284059).
• CVE-2026-63045: improper validation of FTP PASV reply address in mod_proxy_ftp allows an untrusted FTP server to cause a proxy to open a data connection to an arbitrary third-party host (bsc#1284060).
• CVE-2026-63292: stack-based buffer overflow in mod_vhost_alias allows a remote client to cause a DoS or potentially execute arbitrary code via an HTTP request with a specially crafted Host header (bsc#1284061).
• CVE-2026-63686: NULL pointer dereference in mod_xml2enc allows an untrusted backend server to cause a denial of service via a crafted proxied response (bsc#1284058).
• CVE-2026-63718: inconsistent interpretation of HTTP requests in mod_proxy_uwsgi allows for response smuggling via a crafted uwsgi response with Transfer-Encoding (bsc#1284057).
• CVE-2026-73636: authentication bypass by capture-replay in mod_auth_digest allows a MiTM attacker to replay captured digest authentication credentials via crafted requests (bsc#1284056).
• CVE-2026-73637: use-after-free in mod_auth_digest allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests (bsc#1284055).
• CVE-2026-79768: path equivalence issue in the mod_userdir module when configured with absolute non-wildcard UserDir directive (bsc#1284054).
• CVE-2026-93546: integer overflow in mod_dav_fs allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database (bsc#1284053).

This update for apache2 fixes the following issues:

• CVE-2026-42356: deployment of wrong handler allows target of internal redirects from CGI programs to also be treated as CGI and executed (bsc#1284043).
• CVE-2026-42528: memory calculation bug in mod_dav allows an attacker with permission to create WebDAV locks to crash server child processes (bsc#1284044).
• CVE-2026-46729: NULL pointer dereference in mod_heartmonitor over unicast listener (bsc#1284045).
• CVE-2026-47360: session cookie passed to a backend server when SessionCookieRemove changes across internal redirects (bsc#1284046).
• CVE-2026-48005: missing authentication checks in mod_auth_digest allows an unauthenticated remote client to cause a DoS via forged Authorization headers when Digest authentication is enabled with AuthDigestNcCheck (bsc#1284047).
• CVE-2026-56153: out-of-bounds write in mod_charset_lite (bsc#1284048).
• CVE-2026-56154: use-after-free in mod_rewrite when using lookahead (%{LA-U:HTTP:...}) (bsc#1284049).
• CVE-2026-57941: use-after-free in mod_http2 via shared session->bbtmp re-entrancy (bsc#1284050).
• CVE-2026-58415: internal state files accessible to external parties in mod_dav_fs allows a remote client to read WebDAV dead properties of resources it cannot author via a GET request for the .DAV state directory (bsc#1284051).
• CVE-2026-59797: improper privilege management in mod_ssl when using SSLRequire and file-related expressions (bsc#1284059).
• CVE-2026-63045: improper validation of FTP PASV reply address in mod_proxy_ftp allows an untrusted FTP server to cause a proxy to open a data connection to an arbitrary third-party host (bsc#1284060).
• CVE-2026-63292: stack-based buffer overflow in mod_vhost_alias allows a remote client to cause a DoS or potentially execute arbitrary code via an HTTP request with a specially crafted Host header (bsc#1284061).
• CVE-2026-63686: NULL pointer dereference in mod_xml2enc allows an untrusted backend server to cause a denial of service via a crafted proxied response (bsc#1284058).
• CVE-2026-63718: inconsistent interpretation of HTTP requests in mod_proxy_uwsgi allows for response smuggling via a crafted uwsgi response with Transfer-Encoding (bsc#1284057).
• CVE-2026-73636: authentication bypass by capture-replay in mod_auth_digest allows a MiTM attacker to replay captured digest authentication credentials via crafted requests (bsc#1284056).
• CVE-2026-73637: use-after-free in mod_auth_digest allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests (bsc#1284055).
• CVE-2026-79768: path equivalence issue in the mod_userdir module when configured with absolute non-wildcard UserDir directive (bsc#1284054).
• CVE-2026-93546: integer overflow in mod_dav_fs allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database (bsc#1284053).

This update for apache2 fixes the following issues:

• CVE-2026-42356: deployment of wrong handler allows target of internal redirects from CGI programs to also be treated as CGI and executed (bsc#1284043).
• CVE-2026-42528: memory calculation bug in mod_dav allows an attacker with permission to create WebDAV locks to crash server child processes (bsc#1284044).
• CVE-2026-46729: NULL pointer dereference in mod_heartmonitor over unicast listener (bsc#1284045).
• CVE-2026-47360: session cookie passed to a backend server when SessionCookieRemove changes across internal redirects (bsc#1284046).
• CVE-2026-48005: missing authentication checks in mod_auth_digest allows an unauthenticated remote client to cause a DoS via forged Authorization headers when Digest authentication is enabled with AuthDigestNcCheck (bsc#1284047).
• CVE-2026-56153: out-of-bounds write in mod_charset_lite (bsc#1284048).
• CVE-2026-56154: use-after-free in mod_rewrite when using lookahead (%{LA-U:HTTP:...}) (bsc#1284049).
• CVE-2026-57941: use-after-free in mod_http2 via shared session->bbtmp re-entrancy (bsc#1284050).
• CVE-2026-58415: internal state files accessible to external parties in mod_dav_fs allows a remote client to read WebDAV dead properties of resources it cannot author via a GET request for the .DAV state directory (bsc#1284051).
• CVE-2026-59797: improper privilege management in mod_ssl when using SSLRequire and file-related expressions (bsc#1284059).
• CVE-2026-63045: improper validation of FTP PASV reply address in mod_proxy_ftp allows an untrusted FTP server to cause a proxy to open a data connection to an arbitrary third-party host (bsc#1284060).
• CVE-2026-63292: stack-based buffer overflow in mod_vhost_alias allows a remote client to cause a DoS or potentially execute arbitrary code via an HTTP request with a specially crafted Host header (bsc#1284061).
• CVE-2026-63686: NULL pointer dereference in mod_xml2enc allows an untrusted backend server to cause a denial of service via a crafted proxied response (bsc#1284058).
• CVE-2026-63718: inconsistent interpretation of HTTP requests in mod_proxy_uwsgi allows for response smuggling via a crafted uwsgi response with Transfer-Encoding (bsc#1284057).
• CVE-2026-73636: authentication bypass by capture-replay in mod_auth_digest allows a MiTM attacker to replay captured digest authentication credentials via crafted requests (bsc#1284056).
• CVE-2026-73637: use-after-free in mod_auth_digest allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests (bsc#1284055).
• CVE-2026-79768: path equivalence issue in the mod_userdir module when configured with absolute non-wildcard UserDir directive (bsc#1284054).
• CVE-2026-93546: integer overflow in mod_dav_fs allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database (bsc#1284053).

This update for apache2 fixes the following issues:

• CVE-2026-42356: deployment of wrong handler allows target of internal redirects from CGI programs to also be treated as CGI and executed (bsc#1284043).
• CVE-2026-42528: memory calculation bug in mod_dav allows an attacker with permission to create WebDAV locks to crash server child processes (bsc#1284044).
• CVE-2026-46729: NULL pointer dereference in mod_heartmonitor over unicast listener (bsc#1284045).
• CVE-2026-47360: session cookie passed to a backend server when SessionCookieRemove changes across internal redirects (bsc#1284046).
• CVE-2026-48005: missing authentication checks in mod_auth_digest allows an unauthenticated remote client to cause a DoS via forged Authorization headers when Digest authentication is enabled with AuthDigestNcCheck (bsc#1284047).
• CVE-2026-56153: out-of-bounds write in mod_charset_lite (bsc#1284048).
• CVE-2026-56154: use-after-free in mod_rewrite when using lookahead (%{LA-U:HTTP:...}) (bsc#1284049).
• CVE-2026-57941: use-after-free in mod_http2 via shared session->bbtmp re-entrancy (bsc#1284050).
• CVE-2026-58415: internal state files accessible to external parties in mod_dav_fs allows a remote client to read WebDAV dead properties of resources it cannot author via a GET request for the .DAV state directory (bsc#1284051).
• CVE-2026-59797: improper privilege management in mod_ssl when using SSLRequire and file-related expressions (bsc#1284059).
• CVE-2026-63045: improper validation of FTP PASV reply address in mod_proxy_ftp allows an untrusted FTP server to cause a proxy to open a data connection to an arbitrary third-party host (bsc#1284060).
• CVE-2026-63292: stack-based buffer overflow in mod_vhost_alias allows a remote client to cause a DoS or potentially execute arbitrary code via an HTTP request with a specially crafted Host header (bsc#1284061).
• CVE-2026-63686: NULL pointer dereference in mod_xml2enc allows an untrusted backend server to cause a denial of service via a crafted proxied response (bsc#1284058).
• CVE-2026-63718: inconsistent interpretation of HTTP requests in mod_proxy_uwsgi allows for response smuggling via a crafted uwsgi response with Transfer-Encoding (bsc#1284057).
• CVE-2026-73636: authentication bypass by capture-replay in mod_auth_digest allows a MiTM attacker to replay captured digest authentication credentials via crafted requests (bsc#1284056).
• CVE-2026-73637: use-after-free in mod_auth_digest allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests (bsc#1284055).
• CVE-2026-79768: path equivalence issue in the mod_userdir module when configured with absolute non-wildcard UserDir directive (bsc#1284054).
• CVE-2026-93546: integer overflow in mod_dav_fs allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database (bsc#1284053).

Zhang San, Ankit Prateek, Zhen Kong, SeungHyun Cho, Ryoma Nishioka, Keita Sode and Hyojae Lee discovered that Apache HTTP Server did not correctly handle certain memory operations. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-46729)

It was discovered that Apache HTTP Server did not correctly handle certain session cookies. A remote attacker could possibly use this issue to leak sensitive information. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-47360)

Zhen Kong discovered that Apache HTTP Server did not correctly handle certain forms of authentication. An unauthenticated remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-48005)

Bartlomiej Dmitruk and Masumi Tanaka discovered that Apache HTTP Server did not correctly handle certain memory operations. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-56153)

Lucian Nitescu discovered that Apache HTTP Server did not correctly handle certain memory operations. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 26.04 LTS and Ubuntu 26.10. (CVE-2026-56449)

It was discovered that Apache HTTP Server’s mod_rewrite module incorrectly handled memory when performing certain variable lookups. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 26.10. (CVE-2026-56154)

Lucian Nitescu, Simon Kappel, and Gianluca Danesin discovered that Apache HTTP Server’s mod_http2 module incorrectly handled memory when processing certain HTTP/2 connections. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 26.10. (CVE-2026-57941)

Juthawong Naisanguansee, Charles Vosburgh, Mike Read, and Ryoma Nishioka discovered that Apache HTTP Server’s mod_ssl module incorrectly handled certain expressions. An attacker could possibly use this issue to bypass intended access restrictions. This issue only affected Ubuntu 26.10. (CVE-2026-59797)

이지웅 discovered that Apache HTTP Server exposed WebDAV property information. A remote attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 26.10. (CVE-2026-58415)

Zhen Kong and Charles Vosburgh discovered that Apache HTTP Server did not properly validate FTP server responses. A remote attacker could possibly use this issue to make a forward proxy connect to an arbitrary host. This issue only affected Ubuntu 26.10. (CVE-2026-63045)

Hyojae Lee and Zhen Kong discovered that Apache HTTP Server incorrectly handled certain HTTP requests. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 26.10. (CVE-2026-63292)

Lucian Nitescu and Zhen Kong discovered that Apache HTTP Server did not properly handle certain responses from backend servers. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 26.10. (CVE-2026-63686)

Qing Xu discovered that Apache HTTP Server incorrectly interpreted HTTP responses from backend servers. A remote attacker could possibly use this issue to perform HTTP response smuggling attacks. This issue only affected Ubuntu 26.10. (CVE-2026-63718)

Hyojae Lee discovered that Apache HTTP Server did not properly validate…