CVE-2026-7507
HIGH(7.5)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS 7.5 — Hoch
Erwähnungen (letzte 60 Tage)
EPSS-Score
0.8%
Exploit-Wahrscheinlichkeit (30 Tage)
CVSS Score
7.5
Technische Schwere
Beschreibung
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.
Betroffene Produkte
- cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*
GitHub Advisories
Keycloak: Session fixation in OIDC login flow that can lead to account takeover
Referenzen
- https://access.redhat.com/errata/RHSA-2026:19594
- https://access.redhat.com/errata/RHSA-2026:19595
- https://access.redhat.com/errata/RHSA-2026:19596
- https://access.redhat.com/errata/RHSA-2026:19597
- https://access.redhat.com/errata/RHSA-2026:76128
- https://access.redhat.com/errata/RHSA-2026:76129
- https://access.redhat.com/errata/RHSA-2026:76130
- https://access.redhat.com/errata/RHSA-2026:76132
- https://access.redhat.com/errata/RHSA-2026:76134
- https://access.redhat.com/security/cve/CVE-2026-7507