high · CVSS v3 8.7 · CVSS v4 7

CVE-2026-114637

Traefik from v3.2.0 before v3.7.14 contains an authentication bypass vulnerability in the experimental FastProxy connect…

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.

Scores

Severity
high
CVSS v2
7.1
CVSS v3
8.7
CVSS v4
7
EPSS
—

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