CVE-2026-34355

HIGH

Apache HTTP Server: mod_proxy_html buffer overflow

Title source: cna

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 (2)

Core 2

Core References

Vendor Advisory vendor-advisory

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

Mailing List

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

Scores

CVSS v3 7.5

EPSS 0.0059

EPSS Percentile 43.2%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-122

Status published

Products (2)

apache/http_server 2.4.0 - 2.4.68

Apache Software Foundation/Apache HTTP Server 2.4.0 - 2.4.67

Published Jun 08, 2026

Tracked Since Jun 08, 2026