🛡️ CVE-2026-34356 — apache

🟠 CVSS 8.0 — High ✅ No Known Exploit NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Apache HTTP Server: ProxyPassReverseCookieMap buffer overflow

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2026-34356 is recorded against 3 packages.

  • apache
  • http-server (from 2.4.0 up to 2.4.68)
  • unknown

Timeline and source

Published on 10 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

www.openwall.com (Web)
httpd.apache.org (Web)
nvd.nist.gov (Web)

CVE-2026-34356 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-06-10
Updated 2026-08-12
Modified 2026-06-10
Fix URL N/A

Affected Packages

Software From version Fixed in
apache — —
http-server 2.4.0 2.4.68
unknown — —

Similar Threats

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