CVE-2026-23918

HIGH 8.8

Apache HTTP Server: http2: double free and possible RCE on early reset

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-415
Vendor	apache software foundation
Product	apache http server
Published	May 4, 2026
Last Updated	May 4, 2026

Stay Ahead of the Next One

Get instant alerts for apache software foundation apache http server

Be the first to know when new high vulnerabilities affecting apache software foundation apache http server are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

Apache Software Foundation / Apache HTTP Server

2.4.66

References

NVD ↗ CVE.org ↗ EPSS Data ↗

httpd.apache.org: https://httpd.apache.org/security/vulnerabilities_24.html openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/19

Credits

Bartlomiej Dmitruk, striga.ai Stanislaw Strzalkowski, isec.pl