CVE-2026-44631: Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow

Overview

Severity

Critical (CVSS 9.4)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H/E:U

Exploit Status

Not Exploited

Patch Tuesday

2026-Jun

Released

2026-06-11

Last Updated

2026-06-23

EPSS Score

0.50% (percentile: 41.5%)

Affected Products (1)

Other

• 21442-17084

Revision History

• 2026-06-11: Information published.
• 2026-06-23: Information published.