CVE-2026-2603
HIGH EPSS 32.3%
Published Mar 18, 20263mo ago · Modified Jun 17, 20261w ago
8.1 CVSS 3.1
Published Mar 18, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago
Description
A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider (IdP) to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity Provider is disabled, leading to unauthorized authentication.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability None
Threat Intelligence
EPSS Exploit Probability
32.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-306 Missing Authentication for Critical Function Authentication
References 6
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:3925
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:3926
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:3947
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:3948
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-2603
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2440300
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.