CVE-2026-85595
Traefik versions before v2.11.55 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.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.3
- CVSS vector
- 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
- EPSS probability
- 0.41%
- CWE
- CWE-287
- Published
- 2026-09-04
- Last modified
- 2026-09-05
Affected products
- traefik traefik
- traefik traefik
- traefik traefik
Weakness type
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