CVE-2026-43951 PUBLISHED

Apache HTTP Server: OOB Read in `merge_response_headers` can cause crash

Assigner: apache
Reserved: 04.05.2026 Published: 08.06.2026 Updated: 08.06.2026

Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response languages.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

Product Status

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

Credits

  • Zhenpeng (Leo) Lin at depthfirst finder

References

Problem Types

  • CWE-125 Out-of-bounds Read CWE