CVE-2026-34355 PUBLISHED

Apache HTTP Server: mod_proxy_html buffer overflow

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

A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend. Users are recommended to upgrade to version 2.4.68, which fixes this 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

  • Elhanan Haenel finder
  • Junhui Lee finder

References

Problem Types

  • CWE-122 Heap-based Buffer Overflow CWE