CVE-2026-57941CWE-416

CVE-2026-57941

Critical · published October 1, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
48.0
In the wild
Unconfirmed
What it is

Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00600 · 48.0th percentile
Weakness
CWE-416 · Use After Free
Published
2026-10-01T21:17Z
Affected products (1)
ProductVersionsFixed in
apache/http_server≥ 2.4.0, < 2.4.692.4.69
References (2)
https://httpd.apache.org/security/vulnerabilities_24.html · [email protected]http://www.openwall.com/lists/oss-security/2026/10/01/19 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 03 OCT 03:44Z
    EPSS moved — → 0%
    epss
  • 01 OCT 16:06Z
    Apache HTTP Server: mod_http2 use-after-free / wild write via shared session->bbtmp re-entrancy
    cvelistv5