EUVD Vulnerability Catalog

EUVD-2026-71018

Severity: CRITICAL Base Score: 9.3 CVSS Version: 4.0

Vulnerability 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.

CVSS Vector Analysis

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): None
Vulnerability Confidentiality Impact (VC): High
Vulnerability Integrity Impact (VI): High
Vulnerability Availability Impact (VA): High
Subsequent Confidentiality Impact (SC): None
Subsequent Integrity Impact (SI): None
Subsequent Availability Impact (SA): None

Affected Vendors & Systems

Vendor traefik

References & Advisory Links

Metadata Profile

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

VulnCheck

EPSS Probability

0

Known Aliases
GHSA-4v96-rv7j-9wmr CVE-2026-85595
Published On

2026-09-04

Last Updated

2026-09-05