cbcvebase.
CVE-2026-4636
published 2026-04-02

CVE-2026-4636: A flaw was found in Keycloak. An authenticated user with the uma_protection role can bypass User-Managed Access (UMA) policy validation. This allows the…

PriorityP351high8.1CVSS 3.1
AVNACLPRLUINSUCHIHAN
EPSS
0.35%
26.9th percentile
A flaw was found in Keycloak. An authenticated user with the uma_protection role can bypass User-Managed Access (UMA) policy validation. This allows the attacker to include resource identifiers owned by other users in a policy creation request, even if the URL path specifies an attacker-owned resource. Consequently, the attacker gains unauthorized permissions to victim-owned resources, enabling them to obtain a Requesting Party Token (RPT) and access sensitive information or perform unauthorized actions.

Affected

4 ranges
VendorProductVersion rangeFixed in
redhatbuild_of_keycloak
redhatbuild_of_keycloak
redhatbuild_of_keycloak
redhatbuild_of_keycloak

CVSS provenance

nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
vendor_redhat8.1HIGH
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