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.
Fix
Public exploits 16
- Apache HTTP Server 2.4.66 - 'mod_http2' Double-Free Denial of Service (webapps · multiple) Exploit-DB · 2026-05-26
- 12lie20/CVE-2026-23918-test PoC on GitHub
- Bencodin/CVE-2026-23918-poc PoC on GitHub
- CYFARE/CVE-2026-23918-Apache-HTTP-Server-DoubleFree-PoC PoC on GitHub
- aa022/CVE-2026-23918-Passive-Audit PoC on GitHub
- alt3kx/CVE-2026-23918 PoC on GitHub
- gagaltotal/CVE-2026-23918-Double-free-Apache-httpd-mod_http2 PoC on GitHub
- hackervlogofficial/CVE-2026-23918 PoC on GitHub
- insomnisec/Detections-CVE-2026-23918 PoC on GitHub
- qassam-315/CVE-2026-23918-Elite-Auditor PoC on GitHub
- rhasan-com/CVE-2026-23918 PoC on GitHub
- rshosting/Apache-CVE-2026-23918-fix PoC on GitHub
- seguridadentrerios/CVE-2026-23918 PoC on GitHub
- sibersan/apache_audit_cve-2026-23918 PoC on GitHub
- striga-ai/CVE-2026-23918 PoC on GitHub
- xeloxa/CVE-2026-23918-Apache-H2-PoC PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 1
- https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.8 · apacheNVD modified 2026-10-26 19:10
Affected (CPE criteria) 1
cpe:2.3:a:apache:http_server:2.4.66:*:*:*:*:*:*:*
References 6
- https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/04/19 Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:13938
- https://access.redhat.com/security/cve/CVE-2026-23918
- https://bugzilla.redhat.com/show_bug.cgi?id=2465304
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23918.json