CVE-2026-85595
published 2026-09-04CVE-2026-85595: 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…
PriorityP267critical9.3CVSS 4.0
AVNACLATNPRNUINVCHVIHVAHSCNSINSANEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
EPSS
0.41%
34.6th percentile
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
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| traefik | traefik | < 2.11.55 | 2.11.55 |
| traefik | traefik | 3.0.0 – 3.7.10 | — |
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VulDB
Traefik up to 2.11.54 digestAuth middleware improper authentication
vuldb·2026-09-06·CVSS 9.3
CVE-2026-85595 [CRITICAL] Traefik up to 2.11.54 digestAuth middleware improper authentication
A vulnerability described as critical has been identified in Traefik up to 2.11.54. Affected is an unknown function of the component digestAuth middleware. The manipulation results in improper authentication.
This vulnerability is known as CVE-2026-85595. It is possible to launch the attack remotely. No exploit is available.
Upgrading the affected component is recommended.
GHSA
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.
ghsa_unreviewed·2026-09-04
CVE-2026-85595 [CRITICAL] CWE-287 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.
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-09-04
Published