NetSight
IP …
high7.5

CVE-2026-7507

A session fixation vulnerability was found in Keycloak's login-actions endpoints.

Impact

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.

Affected packages

EcosystemPackageAffectedFixed in
mavenorg.keycloak:keycloak-services< 26.6.226.6.2

Affected products

VendorProductAffected versions
RedhatBuild Of Keycloak
from 26.4 before 26.4.12

Weakness classification

CWE-290

References