CVE-2026-34355

high

Description

A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend. Users are recommended to upgrade to version 2.4.68, which fixes this issue.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34355.json

https://httpd.apache.org/security/vulnerabilities_24.html

https://bugzilla.redhat.com/show_bug.cgi?id=2486414

https://access.redhat.com/security/cve/CVE-2026-34355

http://www.openwall.com/lists/oss-security/2026/06/08/6

Details

Source: Mitre, NVD

Published: 2026-06-08

Updated: 2026-06-30

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H