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TI-2026-46765 Aliases CVE-2026-65602GHSA-42cj-m3vj-89wv

Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass

Priority LOW 24CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · None
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-863.

Summary

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references (the allowlist was only enforced for HTTP serversTransport references). A low-privileged Kubernetes user in a namespace not listed in crossProviderNamespaces can set serversTransport: foo@file on an IngressRouteTCP service, causing Traefik to accept the forbidden cross-provider reference and use a file-provider TCPServersTransport — including privileged backend mTLS client certificates, SPIFFE identity, or PROXY-protocol settings. This is fixed in 3.6.23 and 3.7.7.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00333 26th percentileScored 2026-11-07
Fix Partial traefik (traefik): 3.6.23, 3.7.7github.com/traefik/traefik/v3 (Go): 3.6.23, 3.7.7Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
traefiktraefik3.6.0 to before 3.6.233.6.23Patch availableCNA
traefiktraefik3.7.0 to before 3.7.73.7.7Patch availableCNA
—github.com/traefik/traefik/v3 (Go)3.6.0 to before 3.6.233.6.23Patch availableGHSA-42cj-m3vj-89wv
—github.com/traefik/traefik/v3 (Go)3.7.0 to before 3.7.73.7.7Patch availableGHSA-42cj-m3vj-89wv
  • traefik Vendortraefik Affected 3.6.0 to before 3.6.23 Fixed in 3.6.23 Patch available CNA
  • traefik Vendortraefik Affected 3.7.0 to before 3.7.7 Fixed in 3.7.7 Patch available CNA
  • github.com/traefik/traefik/v3 (Go) Vendor— Affected 3.6.0 to before 3.6.23 Fixed in 3.6.23 Patch available GHSA-42cj-m3vj-89wv
  • github.com/traefik/traefik/v3 (Go) Vendor— Affected 3.7.0 to before 3.7.7 Fixed in 3.7.7 Patch available GHSA-42cj-m3vj-89wv

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*3.6.0 to before 3.6.23; 3.7.0 to before 3.7.7Vulnerabletraefik
  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions 3.6.0 to before 3.6.23; 3.7.0 to before 3.7.7 Vulnerable ·traefik

Remediation

  • Fix · CNA traefik (traefik) Fixed in 3.6.23
  • Fix · CNA traefik (traefik) Fixed in 3.7.7
  • Fix · GHSA-42cj-m3vj-89wv github.com/traefik/traefik/v3 (Go) Fixed in 3.6.23 Advisory →
  • Fix · GHSA-42cj-m3vj-89wv github.com/traefik/traefik/v3 (Go) Fixed in 3.7.7 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    traefik 3.7.7

    3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-46763 Traefik before v2.11.52 Authentication Bypass via ReplacePathRegexPriority MEDIUM 41
    • TI-2026-46764 Traefik before 3.7.7 Namespace Confusion via HTTPRoute ExtensionRefPriority LOW 25
    Show all 3 records →
  • Release ·

    traefik 3.6.23

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-46763 Traefik before v2.11.52 Authentication Bypass via ReplacePathRegexPriority MEDIUM 41
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Dev SpacesAffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-65602
  2. 2026-10-03 Alias added: GHSA-42cj-m3vj-89wv

References

Patch 1

Advisory 2

Other 5

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-25774 Uncontrolled Resource Consumption in Traefik CVSS 3.1HIGH 7.5
  • TI-2025-40914 Traefik doesn't Prevent Path Normalization Bypass in Router + Middleware Rules CVSS 4.0MEDIUM 6.9
  • TI-2022-07529 Authorization header displayed in the debug logs CVSS 3.1MEDIUM 6.5
  • TI-2024-30459 HTTP client can remove the X-Forwarded headers in Traefik CVSS 3.1CRITICAL 9.8
  • TI-2026-60261 Traefik v3.7.0 Authentication Bypass via from-to-www-redirect CVSS 4.0CRITICAL 9.3
See all 83 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences