Traefik 2.11.x < 2.11.38 / 3.x < 3.6.9 Connection Header Bypass

The version of Traefik installed on the remote macOS host is 2.11.x prior to 2.11.38 or 3.x prior to 3.6.9. It is, therefore, affected by a vulnerability: - A flaw exists in HTTP/1.1 request handling due to case-sensitive comparison of Connection header tokens against protected header names. An...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity in the processing of HTTP/1.1 requests when handling the Connection header with X-Forwarded headers. An attacker can cause the removal of forwarded identity headers by sending requests with lowercas...

Missing Release of Resource after Effective Lifetime

Overview github.com/traefik/traefik/v2/pkg/server/router/tcp is a modern HTTP reverse proxy and load balancer that makes deploying microservices easy. Traefik integrates with your existing infrastructure components Docker, Swarm mode, Kubernetes, Marathon, Consul, Etcd, Rancher, Amazon ECS, ... a...

CVE-2026-26999

CVE-2026-26999 (Traefik) : A TLS handshake handling flaw on TCP routers may cause handshake stalls. When Traefik processes a TLS connection on a TCP router, the read deadline used for protocol sniffing can be cleared before the TLS handshake completes. If a TLS handshake read error occurs, the co...

CVE-2026-26999

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.38 and 3.6.9, there is a potential vulnerability in Traefik managing TLS handshake on TCP routers. When Traefik processes a TLS connection on a TCP router, the read deadline used to bound protocol sniffing is cleared befor...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling due to unbounded processing of responses in the ForwardAuth middleware due to the lack of restrictions for maxResponseBodySize configuration. An attacker can cause resource exhaustion...

CVE-2026-26998 Traefik: unbounded io.ReadAll on auth server response body causes OOM denial of service(DOS)

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.38 and 3.6.9, there is a potential vulnerability in Traefik managing the ForwardAuth middleware responses. When Traefik is configured to use the ForwardAuth middleware, the response body from the authentication server is...

CVE-2026-26998 Traefik: unbounded io.ReadAll on auth server response body causes OOM denial of service(DOS)

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.38 and 3.6.9, there is a potential vulnerability in Traefik managing the ForwardAuth middleware responses. When Traefik is configured to use the ForwardAuth middleware, the response body from the authentication server is...

CVE-2026-26998 Traefik: unbounded io.ReadAll on auth server response body causes OOM denial of service(DOS)

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.38 and 3.6.9, there is a potential vulnerability in Traefik managing the ForwardAuth middleware responses. When Traefik is configured to use the ForwardAuth middleware, the response body from the authentication server is...

PT-2026-23084

Name of the Vulnerable Software and Affected Versions Traefik versions prior to 2.11.38 and versions prior to 3.6.9 Description Traefik, an HTTP reverse proxy and load balancer, has an issue in its handling of TLS handshakes on TCP routers. The read deadline used for protocol sniffing is cleared...