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TI-2026-79151 Aliases CVE-2026-114639GHSA-wx2g-x89x-v9j3

Authentication bypass in Traefik via shared Negotiate connection pool

Priority LOW 33CWE-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 2.11.0 before 2.11.58 and from 3.0.0 before 3.7.14 contains an authentication bypass (CWE-287). A socket authenticated with an Authorization: Negotiate token is placed in a globally shared backend connection pool that is never isolated. An unauthenticated remote attacker on separate frontend connections can be assigned that socket and read or write data with the victim's identity.

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

Description from the CNA

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 separate frontend connections can be assigned that NTLM/Kerberos-bound socket and perform reads or writes with the victim's identity.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00295 22nd percentileScored 2026-11-07
Fix Fixed traefik (traefik): 2.11.58, 3.7.14

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
traefiktraefik2.11.0 to before 2.11.582.11.58Patch availableCNA
traefiktraefik3.0.0 to before 3.7.143.7.14Patch availableCNA
  • traefik Vendortraefik Affected 2.11.0 to before 2.11.58 Fixed in 2.11.58 Patch available CNA
  • traefik Vendortraefik Affected 3.0.0 to before 3.7.14 Fixed in 3.7.14 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*2.11.0 to before 2.11.58; 3.0.0 to before 3.7.14Vulnerabletraefik
  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions 2.11.0 to before 2.11.58; 3.0.0 to before 3.7.14 Vulnerable ·traefik

Remediation

Upgrade to Traefik 2.11.58 or 3.7.14, depending on the release line in use. CISA KEV and public exploit data are not listed for this flaw in the sources.

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

  • Fix · CNA traefik (traefik) Fixed in 2.11.58
  • Fix · CNA traefik (traefik) Fixed in 3.7.14

Fixed in the same release

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

  • Release ·

    traefik 3.7.14

    8 records Highest priority Priority LOW 8 LOW

    Other records, highest priority first

    • TI-2026-79149 Authentication bypass in Traefik FastProxy connection poolPriority LOW 33
    • TI-2026-79152 Traefik Ingress-NGINX provider lets attackers spoof mTLS client headersPriority LOW 32
    • TI-2026-79148 Traefik Authentication Bypass via ssl-passthrough Ingress HTTP RouterPriority LOW 32
    Show all 8 records →
  • Release ·

    traefik 2.11.58

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-79147 Authentication bypass in Traefik SNI check via HTTP/2 schemePriority LOW 32
    • TI-2026-79154 Traefik lets one service bypass another's TLS certificate checksPriority LOW 30
    • TI-2026-79155 Authentication bypass in Traefik lets clients skip mTLS checksPriority LOW 29
    Show all 5 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-114639
  2. 2026-10-22 Alias added: GHSA-wx2g-x89x-v9j3
  3. 2026-10-23 Priority changed: MEDIUM → LOW
  4. 2026-11-04 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 83 →

Sources

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