CVE-2026-114642
Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 stores its NTLM/Kerberos backend round…
- Risk score
- 58/100
- CVSS
- 8.7 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 22 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 stores its NTLM/Kerberos backend round tripper in a client-connection slot not keyed by ServersTransport, so one service's TLS client configuration is reused for another service's backend. An unauthenticated client can arm the slot via a backend issuing an NTLM or …
- Affected
- See advisory
- Fix
- Upgrade the product to 2.11.58, 3.0.0 or 3.7.14 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 8.7 high
- Remotely exploitable without logging in
References
Original description
Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 stores its NTLM/Kerberos backend round tripper in a client-connection slot not keyed by ServersTransport, so one service's TLS client configuration is reused for another service's backend. An unauthenticated client can arm the slot via a backend issuing an NTLM or Negotiate challenge, then reach another service on the same keep-alive connection, bypassing its root CAs, server name, and certificate verification.
Last activity 22 Oct 2026. Patch Forecast updates every hour.