Web servers stack vulnerabilities · Page 2

Apache HTTP Server: mod_auth_digest DoS attack

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.

• Update to 2.4.18-2ubuntu3.17+esm22
• Update to 2.4.29-1ubuntu4.27+esm13
• Update to 2.4.41-4ubuntu3.23+esm9
• Update to 2.4.52-1ubuntu4.25
• Update to 2.4.58-1ubuntu8.17
• Update to 2.4.66-2ubuntu2.6
• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1
• Update to 2.4.7-1ubuntu4.22+esm17

Apache HTTP Server: mod_auth_digest one-time-nonce replay attack

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.

• Update to 2.4.18-2ubuntu3.17+esm22
• Update to 2.4.29-1ubuntu4.27+esm13
• Update to 2.4.41-4ubuntu3.23+esm9
• Update to 2.4.52-1ubuntu4.25
• Update to 2.4.58-1ubuntu8.17
• Update to 2.4.66-2ubuntu2.6
• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1
• Update to 2.4.7-1ubuntu4.22+esm17

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.

• Update to 2.4.41-4ubuntu3.23+esm9
• Update to 2.4.52-1ubuntu4.25
• Update to 2.4.58-1ubuntu8.17
• Update to 2.4.66-2ubuntu2.6
• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1

Apache HTTP Server: mod_vhost_alias stack overflow

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.

• Update to 2.4.18-2ubuntu3.17+esm22
• Update to 2.4.29-1ubuntu4.27+esm13
• Update to 2.4.41-4ubuntu3.23+esm9
• Update to 2.4.52-1ubuntu4.25
• Update to 2.4.58-1ubuntu8.17
• Update to 2.4.66-2ubuntu2.6
• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1
• Update to 2.4.7-1ubuntu4.22+esm17

Apache HTTP Server: mod_proxy_ftp PASV address handling

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.

• Update to 2.4.18-2ubuntu3.17+esm22
• Update to 2.4.29-1ubuntu4.27+esm13
• Update to 2.4.41-4ubuntu3.23+esm9
• Update to 2.4.52-1ubuntu4.25
• Update to 2.4.58-1ubuntu8.17
• Update to 2.4.66-2ubuntu2.6
• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1
• Update to 2.4.7-1ubuntu4.22+esm17

Apache HTTP Server: mod_ssl SSLRequire allows .htaccess ap_expr file-function

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.

• Update to 2.4.18-2ubuntu3.17+esm21
• Update to 2.4.29-1ubuntu4.27+esm12
• Update to 2.4.41-4ubuntu3.23+esm8
• Update to 2.4.52-1ubuntu4.24
• Update to 2.4.58-1ubuntu8.16
• Update to 2.4.66-2ubuntu2.5
• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1
• Update to 2.4.7-1ubuntu4.22+esm16

Apache HTTP Server: Out-of-Bounds Write in ap_directory_walk() Canonical-Name Rewrite on CASE_BLIND_FILESYSTEM

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.

Apache HTTP Server: mod_dav_fs property database read access

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.

• Update to 2.4.18-2ubuntu3.17+esm22
• Update to 2.4.29-1ubuntu4.27+esm13
• Update to 2.4.41-4ubuntu3.23+esm9
• Update to 2.4.52-1ubuntu4.25
• Update to 2.4.58-1ubuntu8.17
• Update to 2.4.66-2ubuntu2.6
• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1
• Update to 2.4.7-1ubuntu4.22+esm17

Apache HTTP Server: mod_http2 use-after-free / wild write via shared session->bbtmp re-entrancy

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.

• Update to 2.4.29-1ubuntu4.27+esm12
• Update to 2.4.41-4ubuntu3.23+esm8
• Update to 2.4.52-1ubuntu4.24
• Update to 2.4.58-1ubuntu8.16
• Update to 2.4.66-2ubuntu2.5
• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1

Apache HTTP Server: mod_proxy_html: crash in dump_content

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

• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1

Apache HTTP Server: mod_rewrite use-after-free via %{LA-U:HTTP:...}

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.

• Update to 2.4.18-2ubuntu3.17+esm21
• Update to 2.4.29-1ubuntu4.27+esm12
• Update to 2.4.41-4ubuntu3.23+esm8
• Update to 2.4.52-1ubuntu4.24
• Update to 2.4.58-1ubuntu8.16
• Update to 2.4.66-2ubuntu2.5
• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1
• Update to 2.4.7-1ubuntu4.22+esm16

Apache HTTP Server: mod_charset_lite: Heap overflow in finish_partial_char

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.

• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1

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.

• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1

Apache HTTP Server: mod_session: Session cookie not removed during internal redirect

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.

• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1

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.

• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1

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.

• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1

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

• Update to 2.4.69-1
• Update to 2.4.69-1~deb13u1

Traefik: BasicAuth singleflight coalescing reintroduces an unauthenticated username-enumeration timing oracle

Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.7.13, checkPassword in pkg/middlewares/auth/basic_auth.go constructs the BasicAuth singleflight key from the submitted password and stored secret. Concurrent requests for absent usernames therefore coalesce on one key while configured usernames perform separate password hashes, creating an unauthenticated timing discrepancy that reveals whether a username exists. Sequential checks remain cost-equalized, Traefik v2 and Digest authentication are not affected, and the issue does not disclose credentials or bypass authentication. This issue is fixed in version 3.7

NGINX ngx_http_v3_module vulnerability

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with OpenSSL versions <= OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner that is beyond the attacker's control. This may cause a heap buffer overflow in the NGINX worker process leading to a restart and/or limited data corruption. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or limited data corruption. There is no control plane exposure; this is a data plan

• Update to 1.30.4-7
• Update to 1.31.6
• Update to 37.0.6.2
• Update to 37.1.1.2

CVE-2026-90678

An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5. Exploitation requires an HTTP/3 frontend: HAProxy must be built with QUIC support and configured with a QUIC bind listener, and the affected traffic must reach a backend over HTTP/1.1 using chunked transfer coding on a reused connection. Under those conditions, when an HTTP/3 request carries no Content-Length header, the HTTP/3 multiplexer credits the length declared in a DATA frame header to the stream endpoint's known-input-payload estimate at the moment the frame header is decoded, before the payload has been received, and that declared length is emitt