Authorization Flaw in Keycloak Services by Red Hat
CVE-2026-18963

9.1CRITICAL

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Keycloak
Red Hat Jboss Enterprise Application Platform Expansion Pack
Red Hat Single Sign-on 7
Vendor
CVE Published:
18 August 2026

What is CVE-2026-18963?

A security flaw exists in the Keycloak Services component of Red Hat, specifically within the reset-credentials workflow. This vulnerability permits an attacker to initiate a password reset for any user without the need for email verification. As a consequence, it enables unauthorized users to assume total control over target accounts by directly changing user credentials. This could have serious implications for user privacy and data integrity.

References

https://access.redhat.com/security/cve/CVE-2026-18963
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2511595
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank James Paremain for reporting this issue.
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