Is Traefik 3.5.1 affected?

Vulnerabilities affecting 3.5.1

• 9.3
  GHSA-5w68-77r2-r64c Complete authentication bypass in the `digestAuth` middleware
• 9.1
  CVE-2026-88007 Traefik HTTP/3 Backend NTLM Connection Reuse
• 8.8
  CVE-2026-88009 Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging
• 8.2
  GHSA-ww7c-q3mv-xx22 Data race on the shared bufio.Reader after an HTTP/1 upgrade in FastProxy panics the whole process
• 8.2
  GHSA-g55h-rg46-x9c5 TLS option confusion in multi-host routers can bypass mTLS for protected hosts
• 7.8
  GHSA-cxjq-mrr5-89rv Authentication Bypass via Path Traversal in ReplacePathRegex Middleware
• 7.8
  CVE-2026-53622 HTTP/3 mTLS bypass via exact SNI TLSOptions lookup for wildcard and mixed-case hosts
• 7.8
  CVE-2026-48020 Traefik StripPrefix Route-Level Auth Bypass via Path Normalization
• 7.8
  CVE-2026-40912 StripPrefixRegex auth bypass via Path/RawPath desync
• 7.8
  CVE-2026-35051 ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass auth
• 7.8
  CVE-2026-39858 Forwarded alias spoofing top pre-auth decision bypass
• 7.8
  CVE-2026-33186 Fix CVE-2026-33186
• 7.8
  CVE-2026-32305 Potential mTLS Bypass via Fragmented TLS ClientHello Causing Pre-SNI Sniff Fallback to Default Non-mTLS TLS Config
• 7.8
  CVE-2025-68121 TLS ClientAuth Bypass on HTTP/3
• 7.8
  CVE-2025-66490 Path Normalization Bypass in Traefik Router + Middleware Rules
• 7.7
  CVE-2026-27141 HTTP/2 frames can cause a running server to panic
• 7.6
  CVE-2026-71327 Gateway API route identity collision allows cross-namespace backend hijacking
• 7.5
  CVE-2026-26999 TLS Handshake Error Handling Allows Stalled Connections on TCP Routers
• 7.5
  CVE-2026-29054 Case-Sensitive Bypass in Connection Header Allows Removal of X-Forwarded Headers
• 7.5
  CVE-2026-25949 TCP readTimeout bypass via STARTTLS on Postgres
• 7.0
  GHSA-hrpp-p4fc-wwf8 ForwardAuth shares the auth-server connection pool, leaking NTLM/Negotiate-bound identity across clients
• 7.0
  GHSA-53qr-784g-cj35 FastProxy backend connection pool leaks connection-bound NTLM/Negotiate identity to unauthenticated clients
• 7.0
  GHSA-cw35-4q88-3rmp Connection-scoped NTLM/Kerberos sticky round tripper is not keyed by service, applying one service TLS client config to another
• 7.0
  GHSA-qm9f-w54v-q2qh Preauthenticated Negotiate contaminates Traefik's globally shared backend connection pool
• 7.0
  GHSA-fh26-gfpp-7xxx snicheck skips the check when `req.TLS` is nil (HTTP/2 `:scheme http`)
• 7.0
  CVE-2026-88004 Traefik entrypoint header-name sanitization bypassed via request trailers
• 7.0
  CVE-2026-88008 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization in github.com/traefik/traefik/v3
• 7.0
  CVE-2026-71324 Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool
• 6.9
  GHSA-2272-4vv8-65ww Negated Host matcher causes a TLS option conflict that disables client-certificate authentication on the excluded host
• 6.9
  CVE-2026-54764 ForwardAuth middleware leaks X-Forwarded-Port spoofing via untrusted X-Forwarded-Proto when trustForwardHeader=false
• 6.9
  CVE-2026-41181 Errors middleware forwards Authorization and Cookie headers to separate error page service
• 6.4
  GHSA-rh7m-2m44-x32f Traefik: Kubernetes Ingress and Service annotations allow cross-namespace references to Middlewares, ServersTransports, and TLSOptions
• 6.4
  CVE-2026-44774 Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
• 6.3
  GHSA-mhjw-hmjv-p99x Unsynchronized write to the per-connection sticky round tripper shared by concurrent HTTP/2 streams
• 6.3
  CVE-2026-41263 BasicAuth middleware: timing side-channel vulnerability
• 6.3
  CVE-2026-32695 Ingress Rule Injection Allows Host Restriction Bypass in Traefik
• 6.3
  CVE-2026-32595 BasicAuth Middleware Timing Attack Allows Username Enumeration
• 6.1
  CVE-2026-29777 Kubernetes gateway rule injection via unescaped backticks in HTTPRoute match values
• 5.9
  CVE-2026-22045 ACME TLS-ALPN fast path lacks timeouts and close on handshake stall
• 5.9
  CVE-2025-66491 Inverted TLS Verification Logic in Kubernetes NGINX Provider
• 5.3
  CVE-2026-88012 respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded
• 5.3
  CVE-2026-88011 ForwardAuth identity spoofing via dot-form header alias
• 5.1
  CVE-2026-33433 BasicAuth/DigestAuth Identity Spoofing via Non-Canonical headerField
• 4.8
  CVE-2026-71325 `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef
• 4.8
  CVE-2026-41174 Traefik Kubernetes CRD allows unauthorized cross-namespace middleware binding
• 4.4
  CVE-2026-26998 ForwardAuth Middleware Allows Unbounded Response Body, Causing Potential Denial of Service
• high
  CVE-2026-54763 Incomplete fix for CVE-2026-33433 + CVE-2026-39858 cross-cohort: headerField underscore-variant identity spoofing in BasicAuth / DigestAuth / ForwardAuth

Newer releases