CVE-2026-34356 PUBLISHED

Apache HTTP Server: ProxyPassReverseCookieMap buffer overflow

Assigner: apache
Reserved: 27.03.2026 Published: 08.06.2026 Updated: 08.06.2026

Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie*

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.

Product Status

Vendor Apache Software Foundation
Product Apache HTTP Server
Versions Default: unaffected
  • affected from 2.4.0 to 2.4.67 (incl.)

Credits

  • Arkadi Vainbrand finder
  • depthfirst (depthfirst.com) finder

References

Problem Types

  • CWE-122 Heap-based Buffer Overflow CWE