VULNERABILITY INTELLIGENCE

CVE-2026-7507

CVSS score7.5 HIGH
EPSS probability0.84%
CISA KEVNot currently listed
Published2026-05-19
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Description

A session fixation vulnerability was found in Keycloak's login-actions endpoints. An unauthenticated attacker could exploit this flaw by pre-creating an authentication session and tricking a victim into visiting a maliciously crafted link. By leveraging the /login-actions/restart endpoint—which processes session handles without adequate CSRF protection or cookie ownership validation—an attacker can reset the authentication flow state. This causes Single Sign-On (SSO) to authenticate the victim transparently upon clicking the link, allowing the attacker to hijack the required-action form without needing the victim's credentials. A successful exploit could lead to complete account takeover, including highly privileged administrative accounts.

Weakness classification

  • secalert@redhat.com: CWE-290
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-290

Primary references