Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Traefik | Traefik | >= 3.2.0, < 3.7.14 |
Related Weaknesses (CWE)
References
- https://github.com/traefik/traefik/security/advisories/GHSA-53qr-784g-cj35Vendor Advisory
- https://www.vulncheck.com/advisories/traefik-3.2.0-before-3.7.14-fastproxy-ntlm-Third Party Advisory
FAQ
What is CVE-2026-114637?
CVE-2026-114637 is a vulnerability with a CVSS score of 8.7 (HIGH). 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...
How severe is CVE-2026-114637?
CVE-2026-114637 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-114637?
Check the references section above for vendor advisories and patch information. Affected products include: Traefik Traefik.