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Back to active CVEs
Medium · CVSS 6.3CVE-2026-114641

Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round TripperCVE-2026-114641

Answer in brief

CVE-2026-114641 records a Medium severity (CVSS 6.3) vulnerability in Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round Tripper. The current sources do not mark it as known exploited. The current feed maps traefik/traefik (generic), traefik/traefik (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 22, 2026Updated Oct 22, 2026Source checked Oct 22, 2026First seen by HOL Oct 22, 2026Material review Oct 22, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.3
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps traefik/traefik (generic), traefik/traefik (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
traefik/traefikgeneric>=2.11.0 <2.11.582.11.58
traefik/traefikgeneric>=3.0.0 <3.7.143.7.14

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for traefik/traefik, traefik/traefik.
  2. 2Review the reported fix. Update traefik/traefik to 2.11.58; traefik/traefik to 3.7.14 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 22, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Traefik before v2.11.58 and v3.7.14 SNI Check Bypass via HTTP/2 SchemeSame traefik/traefik package
  • Traefik v3.7.13 Authentication Bypass via ssl-passthrough Ingress HTTP RouterSame traefik/traefik package
  • Traefik v3.2.0 before v3.7.14 FastProxy NTLM/Negotiate Connection Pool Identity LeakSame traefik/traefik package
  • Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name CollisionSame traefik/traefik package
  • Traefik before 2.11.58 and 3.7.14 Authentication Bypass via Negotiate Connection PoolSame traefik/traefik package
  • Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX HTTP RouterSame traefik/traefik package

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-362
Source
CVE List V5
Source checked
Oct 22, 2026
References
2 linked sources
Open source record