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HIGHCVE-2026-7307Published Modified CNA redhat

CVE-2026-7307: Keycloak: keycloak: denial of service via specially crafted saml input

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.

Metrics

CVSS v3.1
7.5
Severity
HIGH
Fixed in
26.2.16-1
Affected Products
8

Fix available

26.2.16-126.2-2126.4.12-126.4-17
Affected packages
  • Red Hat / Red Hat build of Keycloak 26.2
    Fixed in 26.2.16-1
  • Red Hat / Red Hat build of Keycloak 26.2
    Fixed in 26.2-21
  • Red Hat / Red Hat build of Keycloak 26.2
    Fixed in 26.2-21
  • Red Hat / Red Hat build of Keycloak 26.2.16
  • Red Hat / Red Hat build of Keycloak 26.4
    Fixed in 26.4.12-1
  • Red Hat / Red Hat build of Keycloak 26.4
    Fixed in 26.4-17
  • Red Hat / Red Hat build of Keycloak 26.4
    Fixed in 26.4-17
  • Red Hat / Red Hat build of Keycloak 26.4.12
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References