CVE-2026-9799Medium· 4.6▾ SunlitKeycloak allows unauthorized access to resources via uma permission ticket bypass
▾ Sunlit zone — Low / medium · no exploitation signal
impact 25.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 29.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.3%
A flaw was found in org.keycloak.authorization. An authenticated user with a granted User-Managed Access (UMA) permission ticket for one resource can exploit this by using a specific permission request prefix to bypass per-resource access control. This allows the user to gain unauthorized access to all resources of that type within the same resource server, even if they do not have a ticket for those specific resources. This vulnerability requires the resource server to be configured in PERMISSIVE policy enforcement mode and affects typed resources with ownerManagedAccess enabled, where no explicit policy protects the resource type. The primary consequence is unauthorized information disclosure or modification of resources.
org.keycloak:keycloak-services < 26.6.4Upgrade to a patched release:
org.keycloak:keycloak-services 26.6.4Connected by shared product, vendor, weakness, or advisory.
GHSA-gfv4-4vr2-rr4gMedium· 4.6Duplicate Advisory: Keycloak allows unauthorized access to resources via uma permission ticket bypass
GHSA-7pm9-g8jh-3m74Medium· 4.9Duplicate Advisory: Keycloak vulnerable to information disclosure through arbitrary filesystem path probing
CVE-2026-9083Medium· 4.9Keycloak vulnerable to information disclosure through arbitrary filesystem path probing
CVE-2026-9086High· 7.3Keycloak vulnerable to cross-site scripting (xss) via case-insensitive uri validation bypass
GHSA-37j9-56gh-j2r7High· 7.3Duplicate Advisory: Keycloak vulnerable to cross-site scripting (xss) via case-insensitive uri validation bypass
CVE-2026-9705Medium· 6.5Keycloak: Attacker can re-enable and take over disabled clients via registration access token