Apache HTTP Server: http2: double free and possible RCE on early reset
55Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.8epss 50%
from disclosure to weapon1 days
Published on NVDMay 4
1st PoC+1d
exploitation probability
50%top 1% of all CVEs
observed exploitation
nono source reports it
8 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Apache Software Foundation · Apache HTTP Serverpublic PoCs found — 8
exploitdbwww.exploit-db.com/exploits/52577unverifiedgithubgithub.com/striga-ai/CVE-2026-23918★ 29githubgithub.com/alt3kx/CVE-2026-23918★ 1githubgithub.com/insomnisec/Detections-CVE-2026-23918★ 0githubgithub.com/Bencodin/CVE-2026-23918-poc★ 0githubgithub.com/sibersan/apache_audit_cve-2026-23918★ 0githubgithub.com/gagaltotal/CVE-2026-23918-Double-free-Apache-httpd-mod_http2★ 0githubgithub.com/aa022/CVE-2026-23918-Passive-Audit★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://access.redhat.com/errata/RHSA-2026:13938https://access.redhat.com/security/cve/CVE-2026-23918https://bugzilla.redhat.com/show_bug.cgi?id=2465304https://httpd.apache.org/security/vulnerabilities_24.htmlhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23918.jsonhttp://www.openwall.com/lists/oss-security/2026/05/04/19