| Package | Affected versions | Patched versions |
|---|---|---|
| traefik | ≥ 2.11.0, < 2.11.58≥ 3.0.0, < 3.7.14 | 2.11.583.7.14 |
Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 contains an authentication bypass because a first request preauthenticated with an Authorization: Negotiate token authenticates a socket in the globally shared backend connection pool, which is never isolated. Unauthenticated attackers on separate frontend connections can be assigned that NTLM/Kerberos-bound socket and perform reads or writes with the victim's identity.
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