CVE-2026-34059

HIGH

Apache HTTP Server: mod_proxy_ajp: Heap Over-Read and memory disclosure in ajp_parse_data()

Title source: cna

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.

References (2)

Core 2

Core References

Vendor Advisory vendor-advisory

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

Mailing List, Third Party Advisory

http://www.openwall.com/lists/oss-security/2026/05/04/17

Scores

CVSS v3 7.5

EPSS 0.0011

EPSS Percentile 28.1%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-126

Status published

Products (2)

apache/http_server < 2.4.67

Apache Software Foundation/Apache HTTP Server < 2.4.66

Published May 04, 2026

Tracked Since May 04, 2026