Apache Software Foundation Apache HTTP Server vulnerabilities

CVE-2026-93546 High · 8.8 CWE-190 Oct 1, 2026

Integer Overflow or Wraparound in Apache Software Foundation Apache HTTP Server

Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database via PROPPATCH requests declaring many XML namespaces.

CVE-2026-79768 Medium · 5.3 CWE-55 Oct 1, 2026

Path equivalence: '/./' (single dot directory) vulnerability in Apache HTTP Server's…

Path equivalence: '/./' (single dot directory) vulnerability in Apache HTTP Server's mod_userdir module when configured with absolute non-wildcard UserDir directive (the 2nd form in https://httpd.apache.org/docs/2.4/mod/mod_userdir.html#userdir) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-73637 High · 7.3 CWE-416 Oct 1, 2026

Use After Free in Apache Software Foundation Apache HTTP Server

Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVE-2026-73636 High · 8.1 CWE-294 Oct 1, 2026

Authentication Bypass by Capture-replay in Apache Software Foundation Apache HTTP Server

Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafted requests that trigger garbage collection of the client's shared memory entry when AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVE-2026-63718 High · 7.5 CWE-444 Oct 1, 2026

Apache HTTP Server: mod_proxy_uwsgi Transfer-Encoding response smuggling

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-2026-63686 High · 7.5 CWE-476 Oct 1, 2026

NULL Pointer Dereference in Apache Software Foundation Apache HTTP Server

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-2026-63292 High · 7.5 CWE-121 Oct 1, 2026

Stack-based Buffer Overflow in Apache Software Foundation Apache HTTP Server

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-2026-63045 High · 7.5 CWE-284 Oct 1, 2026

Improper Access Control in Apache Software Foundation Apache HTTP Server

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-2026-59797 Critical · 9.8 CWE-269 Oct 1, 2026

Improper Privilege Management in Apache Software Foundation Apache HTTP Server

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-2026-59685 High · 7.5 CWE-787 Oct 1, 2026

Out-of-bounds Write in Apache Software Foundation Apache HTTP Server

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-2026-58415 Medium · 5.3 CWE-552 Oct 1, 2026

Files or Directories Accessible to External Parties in Apache Software Foundation Apache HTTP Server

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-2026-57941 Critical · 9.8 CWE-416 Oct 1, 2026

Use After Free in Apache Software Foundation Apache HTTP Server

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-2026-56449 High · 7.5 CWE-787 Oct 1, 2026

Out-of-bounds Write in Apache Software Foundation Apache HTTP Server

Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-56154 Critical · 9.8 CWE-416 Oct 1, 2026

Use After Free in Apache Software Foundation Apache HTTP Server

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-2026-56153 High · 7.5 CWE-787 Oct 1, 2026

Out-of-bounds Write in Apache Software Foundation Apache HTTP Server

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-2026-48005 High · 7.5 CWE-306 Oct 1, 2026

Apache HTTP Server: mod_auth_digest reauthentication attack

Missing authentication checks in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause a denial of service (forced re-authentication) via forged Authorization headers when Digest authentication is enabled with AuthDigestNcCheck . Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVE-2026-47360 High · 7.5 CWE-200 Oct 1, 2026

Exposure of Sensitive Information in Apache Software Foundation Apache HTTP Server

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-2026-46729 High · 7.5 CWE-476 Oct 1, 2026

Apache HTTP Server: mod_heartmonitor denial of service

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-2026-42528 Medium · 4.3 CWE-789 Oct 1, 2026

Apache HTTP Server: mod_dav shared lock overflow

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-2026-42356 Low · 3.7 CWE-430 Oct 1, 2026

Apache HTTP Server: limited RCE for some internal redirects to non-CGI files in CGI directories

Deployment of wrong handler vulnerability in Apache HTTP Server allows the target of some internal redirects from CGI programs to also be treated as CGI and executed. The target must already be in a directory enabled for CGI and have no other extension understood by mod_mime. This issue affects Apache HTTP Server: from 2.4.60 through 2.4.68.

CVE-2026-49975 High · 7.5 CWE-789 Jun 8, 2026

Apache HTTP Server: mod_http2 denial of service

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

CVE-2026-48913 High · 7.3 CWE-416 Jun 8, 2026

Apache HTTP Server: mod_http2 memory corruption when file handles exhausted

Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.67.

CVE-2026-44631 Critical · 9.8 CWE-124 Jun 8, 2026

Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow

Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.

CVE-2026-44186 High · 7.3 CWE-835 Jun 8, 2026

Apache HTTP Server: Loop in `proxy_ftp_handler` in mod_proxy_ftp

Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache HTTP Server with an attacker controlled backend FTP server. This issue affects undefined: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.

CVE-2026-44185 High · 7.3 CWE-126 Jun 8, 2026

Apache HTTP Server: Stack Buffer Over-Read in mod_ssl OCSP `send_request`

Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP server This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.