Patch Forecast
Amber warning
Patch this week.

CVE-2026-114640

Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerability in its…

Risk score
69/100
CVSS
8.7 v3.1
Exploit chance (30 days)
0.2%
Published
22 Oct 2026

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What to know

What it is
Traefik versions 3.7.0 to 3.7.14 contain an authentication bypass vulnerability in its Kubernetes Ingress-NGINX provider. An attacker can impersonate mTLS identities by sending specific headers.
Affected
{'products': ['Traefik'], 'packages': [], 'versions': ['3.7.0', '3.7.1', '3.7.2', '3.7.3', '3.7.4', '3.7.5', '3.7.6', '3.7.7', '3.7.8', '3.7.9', '3.7.10', '3.7.11', '3.7.12', '3.7.13', '3.7.14']}
Fix
Upgrade to version 3.7.14 or later
Exploitation
No known exploitation

Not confirmed. 3.7.1, 3.7.2, 3.7.3, 3.7.4, 3.7.5, 3.7.6, 3.7.7, 3.7.8 isn't in the advisory. Check the vendor's advisory before acting on this.

Why it is Amber

  • CVSS 8.7 high
  • Remotely exploitable without logging in
  • On your watchlist: kubernetes, nginx

References

Original description

Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerability in its Kubernetes Ingress-NGINX provider that forwards client-supplied Ssl-Client-* headers on the plaintext HTTP router. When ssl-redirect is disabled alongside auth-tls-pass-certificate-to-upstream, unauthenticated attackers can send Ssl-Client-Verify: SUCCESS with a chosen certificate subject and issuer to impersonate mTLS identities.

Last activity 22 Oct 2026. Patch Forecast updates every hour.