CVE-2026-18963: Red Hat Build Of Keycloak 26.4

Critical severity, CVSS 9.1. EPSS: 3.2% chance of exploitation in the next 30 days.

A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine for identity and access management in Red Hat Build of Keycloak. The issue allows an unauthenticated attacker to force the password reset process for any user without needing to click the required email verification link. This can result in the attacker gaining full control over target user accounts by directly setting new credentials.

Affected products

• Red Hat Red Hat Build Of Keycloak 26.4: before 26.4.15-1 (fixed in 26.4.15-1); before 26.4-23 (fixed in 26.4-23)
• Red Hat Red Hat Build Of Keycloak 26.4.15
• Red Hat Red Hat Build Of Keycloak 26.6: before 26.6.6-1 (fixed in 26.6.6-1); before 26.6-12 (fixed in 26.6-12)
• Red Hat Red Hat Build Of Keycloak 26.6.6
• Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
• Red Hat Red Hat Single Sign-On 7
• Siemens Industrial Edge Management Cloud: any version
• Siemens Industrial Edge Management Pro v1: from V1.14.9, before V1.15.20 (fixed in V1.15.20)
• Siemens Industrial Edge Management Pro v2: from V2.2.0, before V2.2.2 (fixed in V2.2.2)
• Siemens Industrial Edge Management Virtual: from V2.6.0, before V2.9.1 (fixed in V2.9.1)

Published 2026-08-18. Last modified 2026-09-08.