CVE-2026-33857

MEDIUM5.3EPSS 0.22%

Apache HTTP Server: Off-by-one OOB reads in AJP getter functions

Published: 5/4/2026Modified: 5/13/2026

Description

Out-of-bounds Read vulnerability in mod_proxy_ajp of 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.

Affected packages (3)

Alpine/apache2from 0, < 2.4.67-r0
Bitnami/apachefrom 0, < 2.4.67
Debian/apache2from 0, < 2.4.67-1~deb11u1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References (5)

ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2026-33857
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-33857
WEBhttps://httpd.apache.org/security/vulnerabilities_24.html
WEBhttps://nvd.nist.gov/vuln/detail/CVE-2026-33857
WEBhttp://www.openwall.com/lists/oss-security/2026/05/04/15