CVE-2026-7307 HIGH

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

Vendor Red Hat
Product Red Hat build of Keycloak 26.2.16
Weakness CWE-1286
Published May 19, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 19, 2026 CVE published
June 30, 2026 Record updated