CVE-2026-18963
Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-640 |
| Vendor | red hat |
| Product | red hat build of keycloak 26.4 |
| Published | Aug 18, 2026 |
| Last Updated | Sep 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for red hat red hat build of keycloak 26.4
Be the first to know when new critical vulnerabilities affecting red hat red hat build of keycloak 26.4 are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Red Hat / Red Hat build of Keycloak 26.4
All versions affected Red Hat / Red Hat build of Keycloak 26.4
All versions affected Red Hat / Red Hat build of Keycloak 26.4
All versions affected Red Hat / Red Hat build of Keycloak 26.4.15
All versions affected Red Hat / Red Hat build of Keycloak 26.4.15
All versions affected Red Hat / Red Hat build of Keycloak 26.6
All versions affected Red Hat / Red Hat build of Keycloak 26.6
All versions affected Red Hat / Red Hat build of Keycloak 26.6
All versions affected Red Hat / Red Hat build of Keycloak 26.6.6
All versions affected Red Hat / Red Hat build of Keycloak 26.6.6
All versions affected Red Hat / Red Hat build of Keycloak 26.6.6
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack
All versions affected Red Hat / Red Hat Single Sign-On 7
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:56519 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:56520 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:56523 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:56524 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-18963 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2511595 cert-portal.siemens.com: https://cert-portal.siemens.com/productcert/html/ssa-503852.html
Credits
Red Hat would like to thank James Paremain for reporting this issue.