CVE-2026-27586

Gravedad CVSS v4.0:

ALTA

Tipo:

No Disponible / Otro tipo

Fecha de publicación:

24/02/2026

Última modificación:

24/02/2026

Descripción

*** Pendiente de traducción *** Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, two swallowed errors in `ClientAuthentication.provision()` cause mTLS client certificate authentication to silently fail open when a CA certificate file is missing, unreadable, or malformed. The server starts without error but accepts any client certificate signed by any system-trusted CA, completely bypassing the intended private CA trust boundary. Any deployment using `trusted_ca_cert_file` or `trusted_ca_certs_pem_files` for mTLS will silently degrade to accepting any system-trusted client certificate if the CA file becomes unavailable. This can happen due to a typo in the path, file rotation, corruption, or permission changes. The server gives no indication that mTLS is misconfigured. Version 2.11.1 fixes the vulnerability.

Impacto

Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P CVSS v4.0 Severidad y Métricas:

Puntuación base: 8.80 ALTA
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

Vector de acceso (AV): A través de red
Complejidad de acceso (AC): Bajo
Attack Requirements (AT): Ninguno
Privilegios Requeridos (PR): Ninguno
Interacción del usuario (UI): Ninguno
Confidentiality (VC): Alto
Integrity (VI): Alto
Availability (VA): Ninguno
Confidentiality (SC): Ninguno
Integrity (SI): Ninguno
Availability (SA): Ninguno
Exploit Maturity (E): POC

Puntuación base 4.0

8.80

Gravedad 4.0

ALTA

CVE-2026-27586

Descripción

Impacto

Referencias a soluciones, herramientas e información