CVE-2026-4629

A flaw was found in Keycloak. A highly privileged user with `manage-clients` permission can exploit this vulnerability by injecting a hardcoded role mapper into any client. This action allows the user to bypass existing scope restrictions and inject the `realm-admin` role into generated tokens, resulting in privilege escalation and full administrative access to the realm.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 41% of CVEs (scores of 2026-10-25)

CWE

CWE-266

Published

2026-06-30

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• redhat:build_of_keycloak

References

• https://access.redhat.com/errata/RHSA-2026:50846
• https://access.redhat.com/errata/RHSA-2026:50847
• https://access.redhat.com/errata/RHSA-2026:50848
• https://access.redhat.com/security/cve/CVE-2026-4629
• https://bugzilla.redhat.com/show_bug.cgi?id=2450244

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