Use-after-free in Apache HTTP Server - CVE-2026-57941
Published: October 1, 2026
Vulnerability identifier: #VU153101
CSH Severity: Medium
CVSS v4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57941
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause memory corruption.
The vulnerability exists due to use-after-free in mod_http2 when re-entering operations involving shared session->bbtmp. A remote attacker can trigger re-entrancy involving shared session->bbtmp to cause memory corruption.
Affected software
Apache HTTP Server
How to mitigate CVE-2026-57941
Install security update from vendor's website.
Apache HTTP Server - update to 2.4.69