VULNERABILITY INTELLIGENCE

CVE-2026-28780

CVSS score9.8 CRITICAL
EPSS probability1.38%
CISA KEVNot currently listed
Published2026-05-05
Last modified2026-09-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • security@apache.org: CWE-122
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-787

Primary references