Severity: low Affected versions:
- Apache HTTP Server through 2.4.66 Description: Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server. If mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker controlled bytes after the end of a heap based buffer. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue. Credit: Andrew Lacambra (finder) Elhanan Haenel (finder) Tianshuo Han (<[email protected]>) (finder) Tristan Madani (finder) References: https://httpd.apache.org/security/vulnerabilities_24.html https://httpd.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-28780 Timeline: 2026-02-04: reported 2026-03-18: reported by 3rd finder 2026-02-28: reported by 2nd finder
