CVE-2026-34059 — Apache HTTP Server: mod_proxy_ajp: Heap Over-Read and memory disclosure in ajp_

Description

Buffer Over-read vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.

How to fix CVE-2026-34059

To remediate CVE-2026-34059, upgrade the affected package to a fixed version below.

Alpine/apache2—upgrade to 2.4.67-r0 or later
—upgrade to 2.4.67 or later
—upgrade to 2.4.67-1~deb11u1 or later

Is CVE-2026-34059 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

from 0, < 2.4.67-r0
from 0, < 2.4.67
from 0, < 2.4.67-1~deb11u1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References (5)

ADVISORYsecurity.alpinelinux.org/vuln/CVE-2026-34059
ADVISORYsecurity-tracker.debian.org/tracker/CVE-2026-34059
WEBhttpd.apache.org/security/vulnerabilities_24.html
WEBnvd.nist.gov/vuln/detail/CVE-2026-34059
WEB