authelia

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traefik-stripprefix-auth-bypass-cve-2026-48020-path-normalization

CVE-2026-48020 — Traefik StripPrefix Route-Level Auth Bypass PoC A self-contained proof of concept for CVE-2026-48020 , a route-level authentication/authorization bypass in Traefik's StripPrefix middleware caused by path normalisation happening after routing decisions are made. A request such as...

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 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 backe...

CVE-2026-114641

Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos Negotiate backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over...

CVE-2026-114656

Traefik before 2.11.58 and 3.7.13 contains an authentication bypass vulnerability that allows unauthenticated clients to skip client-certificate checks because negated Host matchers are counted as served domains. Attackers can reach backends protected by RequireAndVerifyClientCert when a router...

CVE-2026-114635

Traefik before v2.11.58 and v3.7.14 contains an authentication bypass vulnerability in its SNI check, which is skipped when request TLS state is nil. Unauthenticated clients can send HTTP/2 requests with the :scheme http pseudo-header over TLS on Go 1.27 builds to reach routers requiring client...

CVE-2026-114638

Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability in the Kubernetes Ingress NGINX provider that merges client CAs when auth-tls-secret names collide after dot-to-dash normalization. Attackers holding certificates from another host's CA can access a host requiring its...

CVE-2026-114636

Traefik v3.7.13 before v3.7.14 contains an access-control bypass in the Kubernetes Ingress NGINX provider, where the HTTP router generated for ssl-passthrough Ingresses on non-TLS entry points never applies the Ingress's access-control annotations. Unauthenticated attackers reaching the HTTP entr...

CVE-2026-114637

Traefik from v3.2.0 before v3.7.14 contains an authentication bypass vulnerability in the experimental FastProxy connection pool, which fails to pin NTLM/Negotiate-authenticated backend connections to their frontend connection. Unauthenticated clients can be handed a pooled keep-alive backend...

CVE-2026-114639

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...

CVE-2026-114640

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, unauthenticate...

Traefik - Open Redirect

Traefik before 1.7.26, 2.2.8, and 2.3.0-rc3 contains an open redirect vulnerability in the X-Forwarded-Prefix header. An attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations. id: CVE-2020-15129 info: name:...

EUVD-2026-107898

Traefik before 2.11.58 and 3.7.13 contains an authentication bypass vulnerability that allows unauthenticated clients to skip client-certificate checks because negated Host matchers are counted as served domains. Attackers can reach backends protected by RequireAndVerifyClientCert when a router...

CVE-2026-114656

Traefik versions prior to 2.11.58 and 3.7.13 are susceptible to an authentication bypass vulnerability. The root cause is that negated Host matchers (e.g., !Host()) are incorrectly counted as served domains. This creates a TLS options conflict when a router rule is used, causing the system to fal...

EUVD-2026-107897

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 backe...

CVE-2026-114642

Traefik versions 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 are vulnerable to a TLS configuration bypass . The root cause is that the NTLM/Kerberos backend round tripper is stored in a client-connection slot not keyed by ServersTransport, causing one service's TLS configuration to be reused fo...

EUVD-2026-107896

Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos Negotiate backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over...

CVE-2026-114641

Traefik versions 2.11.x before 2.11.58 and 3.x before 3.7.14 are vulnerable to a race condition within the NTLM and Kerberos (Negotiate) backend authentication. The root cause is that the per-connection sticky round tripper slot is accessed for reading and writing without proper synchronization. ...

CVE-2026-114640

Traefik versions v3.7.0 before v3.7.14 are affected by an authentication bypass vulnerability in the Kubernetes Ingress-NGINX provider . The issue occurs because the provider forwards client-supplied Ssl-Client-* headers on a plaintext HTTP router. If ssl-redirect is disabled and auth-tls-pass-ce...

EUVD-2026-107895

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, unauthenticate...