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CVE-2026-85595 Details

Description

Traefik versions before v2.11.55 and versions v3.0.0 through v3.7.10 contain an authentication bypass vulnerability in the digestAuth middleware where unknown usernames receive an empty secret instead of rejection. Attackers can compute a valid digest response using the empty secret and arbitrary credentials to bypass authentication on any digestAuth-protected route without a valid username or password.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/traefik/traefik/security/advisories/GHSA-5w68-77r2-r64c	[email protected]	PatchVendor AdvisoryExploitMitigation
https://www.vulncheck.com/advisories/traefik-before-2.11.55-authentication-bypass-via-digestauth	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-287	Improper Authentication	[email protected]

Affected Products

Product	Versions
traefik traefik	< 2.11.55 >= 3.0.0, < 3.7.11
CPE cpe:2.3:a:traefik:traefik:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Sep 16, 2026	Initial Analysis	[email protected]
Sep 5, 2026	CVE Modified	[email protected]
Sep 4, 2026	CVE Modified	CISA-ADP
Sep 4, 2026	New CVE Received	[email protected]