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Software · Apache httpd

Apache HTTP Server Vulnerabilities

The latest security flaws in the Apache HTTP Server (httpd), which ones attackers are using, and whether your version is affected.

New flaws, 30 days
3
Critical, 8 weeks
4
On CISA's exploited list
5
Latest exploited
1 May 2025

Run apachectl -v (or httpd -v) on the server.

Apache httpd Security in Short

Apache httpd is the web server behind most cPanel servers and many older sites. Only the 2.4 line is supported. Its flaws often sit in modules (mod_proxy, mod_rewrite, mod_http2), so whether one affects you depends on which modules are switched on.

How to Keep Apache Patched

  • Update through your distribution, or EasyApache on cPanel, then apachectl configtest && systemctl reload apache2 (or httpd).
  • Switch off modules you don't use (a2dismod on Debian and Ubuntu).
  • Hide the version: ServerTokens Prod and ServerSignature Off.

The Past Eight Weeks

Any Score 7+ 8+ 9+

7 flaws scored 8+, newest first.

1 Oct 2026 Memory corruption Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This… CVE-2026-56154 9.8

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.

Patch now · NVD Record

1 Oct 2026 Memory corruption Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy This iss… CVE-2026-57941 9.8

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.

Patch now · NVD Record

1 Oct 2026 Privilege escalation Improper Privilege Management vulnerability in Apache HTTP Server's mod_ssl via SSLRequire and file-related e… CVE-2026-59797 9.8

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.

Patch now · NVD Record

1 Oct 2026 Memory corruption Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an authenticated WebDAV client wit… CVE-2026-93546 8.8

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.

Patch this week · NVD Record

1 Oct 2026 Authentication bypass Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2… CVE-2026-73636 8.1

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.

Patch this week · NVD Record

22 Sep 2026 Apache HTTP Server · Access control flaw The Apache Lounge Windows distribution of Apache HTTP Server build contains an insecure installation director… CVE-2026-89282 9.1

The Apache Lounge Windows distribution of Apache HTTP Server build contains an insecure installation directory permissions vulnerability through its default install directory on C:\, which inherits write access for Authenticated Users.

Patch now · NVD Record

22 Sep 2026 openssl.cnf path · Access control flaw The Apache Lounge Windows distribution of Apache HTTP Server build contains a hardcoded configuration path vu… CVE-2026-89281 8.4

The Apache Lounge Windows distribution of Apache HTTP Server build contains a hardcoded configuration path vulnerability within openssl.cnf path that can allow local code execution.

Patch this week · NVD Record

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