QwikSec

Security Database

CVE

CWE

Training

CVE-2026-33523

Published: May 4, 2026

Modified: May 4, 2026

PUBLISHED

Description

HTTP response splitting vulnerability in multiple Apache HTTP Server modules with untrusted or compromised backend servers. This issue affects Apache HTTP Server: from through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.

Vendor	Product	Versions
Apache Software Foundation	Apache HTTP Server	affected `2.4.0 - <= 2.4.66`

Weaknesses (CWE)

References

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

vendor-advisory

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.