CVE-2026-33006

MEDIUMNVD 4.84.8—

4.8

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.

CVSS v3: 4.8
EG Score: 4.8(high)
EPSS: 40.9%
KEV: Not listed

Published

May 4, 2026

Last Modified

May 4, 2026

Advisory Details (2)

Auto-updated May 4, 2026

⚠️ Active exploitation confirmed. Patch available.

generic

oss-security - CVE-2026-33006: Apache HTTP Server: mod_auth_digest timing attack

http://www.openwall.com/lists/oss-security/2026/05/04/21

generic Patch Available🔴 Active Exploitation

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

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

Vendor Advisories for CVE-2026-33006(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2026-33006
Microsoft Security Response Center (MSRC)
Apache HTTP Server: mod_auth_digest timing attack

Frequently asked(5)

What is CVE-2026-33006?

CVE-2026-33006 is a medium vulnerability published on May 4, 2026. A timing attack against modauthdigest 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.

When was CVE-2026-33006 disclosed?

CVE-2026-33006 was first published in the National Vulnerability Database on May 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-33006 actively exploited?

CVE-2026-33006 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 40.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-33006?

CVE-2026-33006 has a CVSS v3 base score of 4.8 (NVD).

How do I remediate CVE-2026-33006?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33006, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-33006

📅 Published

🔄 Last Modified

📋 Advisory Details (2)

oss-security - CVE-2026-33006: Apache HTTP Server: mod_auth_digest timing attack

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

📣 Vendor Advisories for CVE-2026-33006(1)

❓ Frequently asked(5)