CVE-2026-7307: fallo de gravedad alta en keycloak
Keycloak: keycloak: denial of service via specially crafted saml input
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.5epss 0.9%
A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service (DoS) where the server becomes unavailable.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Productos afectados
keycloakRed Hat · Red Hat build of Keycloak 26.2Red Hat · Red Hat build of Keycloak 26.2.16Red Hat · Red Hat build of Keycloak 26.4Red Hat · Red Hat build of Keycloak 26.4.12Red Hat · Red Hat Single Sign-On 7.6.13Red Hat · Red Hat Single Sign-On 7.6 for RHEL 7Red Hat · Red Hat Single Sign-On 7.6 for RHEL 8Red Hat · Red Hat Single Sign-On 7.6 for RHEL 9Red Hat · RHEL-8 based Middleware ContainersCVEs relacionadas — keycloak
En el mismo producto, de las más peligrosas a las menos.
CVE-2024-3656HIGHKeycloak: unguarded admin rest api endpoints allows low privilege users to use administrative functionalitiesEPSS 3.3%CVE-2024-8698HIGHKeycloak-saml-core: improper verification of saml responses leading to privilege escalation in keycloakEPSS 2.0%CVE-2024-1132HIGHKeycloak: path transversal in redirection validationEPSS 1.6%CVE-2024-10270MEDIUMOrg.keycloak:keycloak-services: keycloak denial of serviceEPSS 1.2%CVE-2023-6484MEDIUMKeycloak: log injection during webauthn authentication or registrationEPSS 1.0%CVE-2024-11734MEDIUMOrg.keycloak:keycloak-quarkus-server: denial of service in keycloak server via security headersEPSS 0.9%
Referencias
https://access.redhat.com/errata/RHSA-2026:19594https://access.redhat.com/errata/RHSA-2026:19595https://access.redhat.com/errata/RHSA-2026:19596https://access.redhat.com/errata/RHSA-2026:19597https://access.redhat.com/errata/RHSA-2026:76128https://access.redhat.com/errata/RHSA-2026:76129https://access.redhat.com/errata/RHSA-2026:76130https://access.redhat.com/errata/RHSA-2026:76132https://access.redhat.com/errata/RHSA-2026:76134https://access.redhat.com/security/cve/CVE-2026-7307https://bugzilla.redhat.com/show_bug.cgi?id=2476526https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7307.json