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TI-2026-79149 Aliases CVE-2026-114637GHSA-68x8-f35f-jp2f

Authentication bypass in Traefik FastProxy connection pool

Priority LOW 33CWE-488Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Traefik from v3.2.0 before v3.7.14 contains an authentication bypass vulnerability in the experimental FastProxy connection pool. The pool fails to pin NTLM and Negotiate authenticated backend connections to the frontend connection that completed the handshake, which exposes data to the wrong session (CWE-488). An unauthenticated remote client can be handed a pooled keep-alive backend connection where a victim completed the handshake, which lets the client read the victim's data and act as that victim.

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

Description from the CNA

Traefik from v3.2.0 before v3.7.14 contains an authentication bypass vulnerability in the experimental FastProxy connection pool, which fails to pin NTLM/Negotiate-authenticated backend connections to their frontend connection. Unauthenticated clients can be handed a pooled keep-alive backend connection where a victim completed an NTLM or Negotiate handshake, letting them read victim data and act as that victim.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00284 21st percentileScored 2026-11-07
Fix Fixed traefik (traefik): 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
traefiktraefik3.2.0 to before 3.7.143.7.14Patch availableCNA
  • traefik Vendortraefik Affected 3.2.0 to before 3.7.14 Fixed in 3.7.14 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*3.2.0 to before 3.7.14Vulnerabletraefik
  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions 3.2.0 to before 3.7.14 Vulnerable ·traefik

Remediation

Update Traefik to v3.7.14, which fixes this issue in the FastProxy connection pool.

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

  • 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-2026-79151 Authentication bypass in Traefik via shared Negotiate 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 →

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-2026-114637
  2. 2026-10-22 Alias added: GHSA-68x8-f35f-jp2f
  3. 2026-10-23 Priority changed: MEDIUM → LOW
  4. 2026-10-28 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