CVE Watch15 jul 2026

CVE-2026-32305

Traefik is an HTTP reverse proxy and load balancer. Versions 2.11.40 and below, 3.0.0-beta1 through 3.6.11, and 3.7.0-ea.1 are vulnerable to

CVSS

5.3

Medio

EPSS

0.4%

p35

KEV

—

Exploit Today

0-100

Publicado: 20 mar 2026 · Última mod.: 15 jul 2026 · CWE-287 · CWE-1188 · CWE-179

EPSS · 30d

0.4%EPSS · 30 días0.4%

2026-08-252026-09-23

Descripción técnica

Traefik is an HTTP reverse proxy and load balancer. Versions 2.11.40 and below, 3.0.0-beta1 through 3.6.11, and 3.7.0-ea.1 are vulnerable to mTLS bypass through the TLS SNI pre-sniffing logic related to fragmented ClientHello packets. When a TLS ClientHello is fragmented across multiple records, Traefik's SNI extraction may fail with an EOF and return an empty SNI. The TCP router then falls back to the default TLS configuration, which does not require client certificates by default. This allows an attacker to bypass route-level mTLS enforcement and access services that should require mutual TLS authentication. This issue is patched in versions 2.11.41, 3.6.11 and 3.7.0-ea.2.

Referencias oficiales

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