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CVE-2026-27134

Estado: ModificadaAlta (8.1)—

Strimzi provides a way to run an Apache Kafka cluster on Kubernetes or OpenShift in various deployment configurations. In versions 0.49.0 through 0.50.0, when using a custom Cluster or Clients CA with a multistage CA chain consisting of multiple CAs, Strimzi incorrectly configures the trusted certificates for mTLS authentication on the internal as well as user-configured listeners. All CAs from the CA chain will be trusted. And users with certificates signed by any of the CAs in the chain will be able to authenticate.

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This issue affects only users using a custom Cluster or Clients CA with a multistage CA chain consisting of multiple CAs. It does not affect users using the Strimzi-managed Cluster and Clients CAs. It also does not affect users using custom Cluster or Clients CA with only a single CA (i.e., no CA chain with multiple CAs). This issue has been fixed in version 0.50.1. To workaround this issue, instead of providing the full CA chain as the custom CA, users can provide only the single CA that should be used.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N sin autenticación y cadena de CAs misconfigurante permite autenticarse con certificados de CAs intermediarias no intencionadas (T1078); Strimzi controla autenticación TLS (T1556).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementUser Account ManagementPassword PoliciesMulti-factor AuthenticationApplication Developer GuidanceActive Directory Configuration

Tecnologías afectadas (1)

Linuxfoundation — Strimzi Kafka Operator

CWE

Referencias

JSON original (NVD)

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      "value": "Strimzi proporciona una forma de ejecutar un clúster de Apache Kafka en Kubernetes u OpenShift en varias configuraciones de despliegue. En las versiones 0.49.0 a 0.50.0, al usar una CA de clúster o clientes personalizada con una cadena de CA multifase que consta de múltiples CA, Strimzi configura incorrectamente los certificados de confianza para la autenticación mTLS tanto en los oyentes internos como en los configurados por el usuario. Todas las CA de la cadena de CA serán de confianza. Y los usuarios con certificados firmados por cualquiera de las CA de la cadena podrán autenticarse. Este problema afecta solo a los usuarios que usan una CA de clúster o clientes personalizada con una cadena de CA multifase que consta de múltiples CA. No afecta a los usuarios que usan las CA de clúster y clientes gestionadas por Strimzi. Tampoco afecta a los usuarios que usan una CA de clúster o clientes personalizada con solo una única CA (es decir, sin cadena de CA con múltiples CA). Este problema ha sido solucionado en la versión 0.50.1. Como solución alternativa a este problema, en lugar de proporcionar la cadena de CA completa como la CA personalizada, los usuarios pueden proporcionar solo la única CA que debe usarse."
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