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TI-2026-83074 Aliases CVE-2026-119572GHSA-432c-8xc8-xf66

Authentication bypass in Traefik Ingress NGINX provider disables mTLS

Priority LOW 30CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

Traefik from 3.7.0-ea.1 before 3.7.15 has an authentication bypass in its Kubernetes Ingress NGINX provider (CWE-287). The provider silently disables mTLS configured via the auth-tls-secret annotation when another Ingress on the same host declares a path without matching auth-tls settings. Traefik then falls back to default TLS options, so an unauthenticated remote attacker can reach backends that require client certificates.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Traefik from 3.7.0-ea.1 before 3.7.15 contains an authentication bypass vulnerability in the Kubernetes Ingress NGINX provider that silently disables mTLS configured via the auth-tls-secret annotation. When another Ingress declares a path on the same host without matching auth-tls settings, Traefik falls back to default TLS options, letting unauthenticated attackers reach backends requiring client certificates.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00188 8th percentileScored 2026-11-07
Fix Fixed traefik (traefik): 3.7.15

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
traefiktraefik3.7.0-ea.1 to before 3.7.153.7.15Patch availableCNA
  • traefik Vendortraefik Affected 3.7.0-ea.1 to before 3.7.15 Fixed in 3.7.15 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*——traefik
  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions — — ·traefik

Remediation

Upgrade Traefik to version 3.7.15, which is the fixed version for the affected range.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA traefik (traefik) Fixed in 3.7.15

Fixed in the same release

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

  • Release ·

    traefik 3.7.15

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-83076 Data race in Traefik FastProxy enables unauthenticated denial of servicePriority LOW 35
    • TI-2026-83075 Authorization bypass in Traefik Kubernetes Ingress NGINX providerPriority LOW 11
    Show all 3 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-119572
  2. 2026-10-30 Alias added: GHSA-432c-8xc8-xf66
  3. 2026-11-01 Priority changed: MEDIUM → LOW
  4. 2026-11-05 CISA SSVC decision points changed
  5. 2026-11-06 Affected versions changed · Red Hat
  6. 2026-11-06 CVSS score added · Red Hat

References

Advisory 1

  • 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 85 →

Sources

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