CVE-2025-10044

Published: Sep 5, 2025

Modified: Dec 19, 2025

PUBLISHED

CVSS v3.1

4.3

MEDIUM

Description

A flaw was found in Keycloak. Keycloak’s account console and other pages accept arbitrary text in the error_description query parameter. This text is directly rendered in error pages without validation or sanitization. While HTML encoding prevents XSS, an attacker can craft URLs with misleading messages (e.g., fake support phone numbers or URLs), which are displayed within the trusted Keycloak UI. This creates a phishing vector, potentially tricking users into contacting malicious actors.

Vendor	Product	Versions
Keycloak	keycloak	affected `0 - < 26.2.9`
Red Hat	Red Hat build of Keycloak 26.0	unaffected `26.0.17-1 - < *`
Red Hat	Red Hat build of Keycloak 26.0	unaffected `26.0-21 - < *`
Red Hat	Red Hat build of Keycloak 26.0	unaffected `26.0-22 - < *`
Red Hat	Red Hat build of Keycloak 26.0.17	All versions
Red Hat	Red Hat build of Keycloak 26.2	unaffected `26.2.9-1 - < *`
Red Hat	Red Hat build of Keycloak 26.2	unaffected `26.2-9 - < *`
Red Hat	Red Hat build of Keycloak 26.2	unaffected `26.2-9 - < *`
Red Hat	Red Hat build of Keycloak 26.2.9	All versions