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Vulnerabilidades / CVE-2026-16442

crítica

CVE-2026-16442

keycloak-services: keycloak-services: SAML IdP-initiated broker login bypasses link-only restriction

Publicada Modificada CWE 346
En la Trivy database desde, como mínimo, el 24 oct 2026, 07:11 UTCNo consta cuándo entró antes de ese build.

Severidad por fuente

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Bitnami9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

La etiqueta propia de Trivy es CRITICAL. Crítica según NVD, Bitnami. Más baja según Red Hat (alta).

Descripción

A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.

Paquetes afectados y versiones corregidas

FuentePaqueteCorregido en
bitnami::Bitnami Vulnerability Databasekeycloak26.4.14, 26.6.5
rapidfort alpine 3.20keycloak26.7.3-r0
rapidfort alpine 3.21keycloak26.7.3-r0
rapidfort alpine 3.22keycloak26.7.3-r0
rapidfort alpine 3.23keycloak26.7.3-r0
rapidfort alpine 3.24keycloak26.7.3-r0

Referencias

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.