Vulnerabilities CVE-2026-2603

CVE-2026-2603

High

Open

TLP:CLEAR

Keycloak: keycloak: unauthorized authentication via disabled saml identity provider

NVD CVE.org

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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.

Details

CVSS Score: 8.1
EPSS Score ⓘ: 0.41%

34.4th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Confidence: 90%
Published: Mar 18, 2026
Last Modified: Jul 15, 2026

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