CVE-2026-23918

high

Description

Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol. This issue affects Apache HTTP Server: 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.

References

Advisories
References

https://httpd.apache.org/security/vulnerabilities_24.html

http://www.openwall.com/lists/oss-security/2026/05/04/19

https://www.helpnetsecurity.com/2026/05/18/debian-13-5-released/

https://securityaffairs.com/191759/security/apache-fixes-critical-http-2-double-free-flaw-cve-2026-23918-enabling-rce.html

https://www.securityweek.com/critical-high-severity-vulnerabilities-patched-in-apache-mina-http-server/

https://thehackernews.com/2026/05/critical-apache-http2-flaw-cve-2026.html

Details

Source: Mitre, NVD

Published: 2026-05-04

Updated: 2026-05-04

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

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