Critical severity9.8NVD Advisory· Published Jun 8, 2026· Updated Jun 11, 2026

CVE-2026-44631

Description

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.

LLM-synthesized narrative grounded in this CVE's description and references.

Apache/HTTP Server2 versions
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*range: >=2.4.0,<2.4.68
- (no CPE)range: >=2.4.0, <=2.4.67
osv-coords12 versions
pkg:bitnami/apache pkg:rpm/almalinux/httpd pkg:rpm/almalinux/httpd-core pkg:rpm/almalinux/httpd-devel pkg:rpm/almalinux/httpd-filesystem pkg:rpm/almalinux/httpd-manual pkg:rpm/almalinux/httpd-tools pkg:rpm/almalinux/mod_ldap pkg:rpm/almalinux/mod_lua pkg:rpm/almalinux/mod_proxy_html pkg:rpm/almalinux/mod_session pkg:rpm/almalinux/mod_ssl
>= 2.4.0, < 2.4.68+ 11 more
- (no CPE)range: >= 2.4.0, < 2.4.68
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 1:2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 1:2.4.63-13.el10_2.4