CVE-2026-7507
A session fixation vulnerability was found in Keycloak's login-actions endpoints.
Published May 19, 2026 · updated Oct 6, 2026 · redhat build of keycloak
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.
Code
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No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 19, 2026 · NIST NVD
Detected
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 ca
Oct 6, 2026 · NIST NVD
Updated
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 ca
Affected
- cpe redhat/build of keycloakversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-7507
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-7507
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
nvd.nist.gov