PT-2026-41880 · Red Hat · Keycloak

Published 2026-05-19 · Updated 2026-05-19 · CVE-2026-7507

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Keycloak (affected versions not specified)

Description A session fixation issue exists in the login-actions endpoints. An unauthenticated attacker can pre-create an authentication session and trick a victim into visiting a malicious link. By using the '/login-actions/restart' endpoint, which lacks sufficient CSRF (Cross-Site Request Forgery) protection and cookie ownership validation, the attacker can reset the authentication flow state. This allows Single Sign-On (SSO) to authenticate the victim transparently, enabling the attacker to hijack the required-action form without credentials. This can result in full account takeover, including administrative accounts.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Authentication Bypass by Spoofing

Weakness Enumeration

CWE-290

Related Identifiers

CVE-2026-7507

GHSA-HF67-5VVQ-FM3R

Affected Products

Keycloak

References · 12

• https://bugzilla.redhat.com/show_bug.cgi?id=2464145 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:19595 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:19597 · Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-7507 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-hf67-5vvq-fm3r · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:19594 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:19596 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-7507 · Security Note
• https://github.com/keycloak/keycloak · Note
• https://github.com/keycloak/keycloak/pull/49134 · Note
• https://github.com/keycloak/keycloak/releases/tag/26.6.2 · Note
• https://github.com/keycloak/keycloak/commit/d791b270b9ea5203be40a9533c1c12c4d044fb52 · Note