CVE-2026-2603

HighCVSS 8.1/10Last modified Aug 18, 2026

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.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-306

Affected software

No affected versions have been published.

Timeline

Published
Mar 18, 2026
Last modified
Aug 18, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-260309.9Semantic Kernel, Microsoft's semantic kernel Python SDK, has a remote code execution vulnerability in versions prior to 1.39.4, specificallyCVE-2026-260315.3Frappe Learning Management System (LMS) is a learning system that helps users structure their content. Prior to 2.44.0, security issue was iCVE-2026-260325.4The PackagerResolver of Apache Ivy is able to download online artifacts and to (re)package them in a format defined by a packager.xml file. CVE-2026-260338.4UPS Multi-UPS Management Console (MUMC) version 01.06.0001 (A03) contains an Unquoted Search Path or Element (CWE-428) vulnerability, which CVE-2026-260348.5UPS Multi-UPS Management Console (MUMC) version 01.06.0001 (A03) contains an Incorrect Default Permissions (CWE-276) vulnerability that alloCVE-2026-260359.8An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, ForCVE-2026-26045.6A flaw was found in evolution-data-server. Inconsistent comparison logic in the addressbook file backend allows a Flatpak application with DCVE-2026-260457.2A flaw was identified in Moodle’s backup restore functionality where specially crafted backup files were not properly validated during proceCVE-2026-260467.2A vulnerability was found in a Moodle TeX filter administrative setting where insufficient sanitization of configuration input could allow cCVE-2026-260476.5A denial-of-service vulnerability was identified in Moodle’s TeX formula editor. When rendering TeX content using mimetex, insufficient execCVE-2026-260487.5The Wi-Fi router is vulnerable to de-authentication attacks due to the absence of management frame protection, allowing forged deauthenticaCVE-2026-260495.7The web management interface of the device renders the passwords in a plaintext input field. The current password is directly visible to a