CVE-2026-33006

Apache HTTP Server: mod_auth_digest timing attack

State: Published
Severity: 4.8 Medium
Published: May 4, 2026
Updated: May 4, 2026
Reserved: Mar 17, 2026

Description

A timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest authentication by a remote attacker.

Users are recommended to upgrade to version 2.4.67, which fixes this issue.

Scores

CVSS	Score	Vector	Source
3.1	4.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-208 Observable Timing Discrepancy

Affected Products

Product	Versions
Apache HTTP ServerApache Software Foundation	2.4.66 and earlierAffected

References

https://httpd.apache.org/security/vulnerabilities_24.htmlvendor-advisory
http://www.openwall.com/lists/oss-security/2026/05/04/21

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