CVE-2026-33523

MediumCVSS 6.5/10Last modified Oct 26, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-443

Affected software

VendorProductVersions
Apache Software FoundationApache HTTP Server>= 2.4.0, <= 2.4.66

References

Timeline

Published
May 4, 2026
Last modified
Oct 26, 2026
NVD status
Analyzed

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CVE-2026-33523: Medium severity, CVSS 6.5 | Vulnix