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CVE PROGRAM SOURCE RECORD9.3 Critical

CVE-2026-85595

Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth

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Status
Published
Published
Updated
Assigning organization
VulnCheck

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

traefik traefik

Default version status: unaffected

  • 0 to < 2.11.55affected
  • 2.11.55unaffected
pkg:golang/github.com/traefik/traefik/v2

traefik traefik

Default version status: unaffected

  • 3.0.0 to ≤ 3.7.10affected
pkg:golang/github.com/traefik/traefik/v3

References