CVEvulnerability

CVE-2026-16442

9.8 CRITICAL Published 2026-08-05 Modified 2026-08-10 Official page ↗
Status
Analyzed
Published
2026-08-05
Last modified
2026-08-10
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-346

Description

A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.

Affected configurations

• redhat build of keycloak (>= 26.4 < 26.4.14) • redhat build of keycloak (>= 26.6 < 26.6.5)

Related

Weakness · CWE (1)

  • CWE-346 Origin Validation Error weakness

References