| Name | CVE-2026-34356 |
| Description | Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie* This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4629-1 |
| Debian Bugs | 1139340 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| apache2 (PTS) | bullseye | 2.4.62-1~deb11u1 | vulnerable |
| bullseye (security) | 2.4.67-1~deb11u3 | fixed |
| bookworm | 2.4.67-1~deb12u2 | vulnerable |
| bookworm (security) | 2.4.67-1~deb12u3 | vulnerable |
| trixie | 2.4.67-1~deb13u2 | vulnerable |
| trixie (security) | 2.4.67-1~deb13u3 | vulnerable |
| forky | 2.4.67-1 | vulnerable |
| sid | 2.4.68-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[trixie] - apache2 <no-dsa> (Minor issue)
[bookworm] - apache2 <no-dsa> (Minor issue)
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2026-34356
Fixed by: https://github.com/apache/httpd/commit/403269396d24404e2576a9b20f96cd0b10574048 (2.4.68-rc1-candidate)
Fixed by: https://github.com/apache/httpd/commit/a70753d294292e8c9f68758cfe3550d83f812129 (trunk)