CVE-2026-34355: Apache HTTP Server

High severity, CVSS 7.5. EPSS: 2.7% chance of exploitation in the next 30 days.

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.

Affected products

• Apache HTTP Server: from 2.4.0, before 2.4.68 (fixed in 2.4.68)

Published 2026-06-08. Last modified 2026-09-14.