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.

INFO

Published Date :

2026-03-18T01:14:53.540Z

Last Modified :

2026-03-18T14:10:10.355Z

Source :

redhat
AFFECTED PRODUCTS

The following products are affected by CVE-2026-2603 vulnerability.

Vendors Products
Keycloak
  • Keycloak
Redhat
  • Build Keycloak
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-2603.

URL Resource
https://access.redhat.com/errata/RHSA-2026:3925 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:3926 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:3947 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:3948 cve-icon cve-icon
https://access.redhat.com/security/cve/CVE-2026-2603 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2440300 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-2603 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-2603 cve-icon
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CVSS Vulnerability Scoring System

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