CVE-2026-44631: Apache HTTP Server

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Apache HTTP Server: from 2.4.0, before 2.4.68 (fixed in 2.4.68)

Published 2026-06-08. Last modified 2026-07-23.