CVE-2026-44631 PUBLISHED

Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow

Assigner: apache
Reserved: 07.05.2026 Published: 08.06.2026 Updated: 08.06.2026

Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.

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

  • Zhenpeng (Leo) Lin at depthfirst finder
  • Bartlomiej Dmitruk finder

References

Problem Types

  • CWE-124: Buffer Underwrite CWE