EUVD-2026-41556
GHSA-p39j-8498-pcjw
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Scope changed to C because token injection directly affects downstream relying-party applications outside the vulnerable Keycloak component; PR:L reflects required delegated admin account.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
1DescriptionCVE.org
A flaw was found in the ClientResource component of Keycloak's admin services when Fine-Grained Admin Permissions (FGAP) v2 is enabled. This issue allows a delegated administrator, who should only have limited control over specific clients, to attach or remove hidden client scopes that they are not authorized to see or manage. As a result, an attacker could inject unauthorized data or permissions into the security tokens issued to end-users, potentially tricking other applications into granting higher levels of access than intended.
AnalysisAI
Keycloak's ClientResource admin API component, when Fine-Grained Admin Permissions v2 (FGAP v2) is enabled, permits a delegated administrator to attach or detach hidden client scopes that fall outside their authorized management boundary. By injecting unauthorized scopes into client configurations, an attacker can manipulate the contents of OAuth2/OIDC security tokens issued to end-users, causing downstream applications to grant privilege levels beyond what the original access policy intended. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation strictly requires that Fine-Grained Admin Permissions v2 (FGAP v2) is explicitly enabled on the target Keycloak realm - this is a non-default, opt-in feature and standard Keycloak deployments are not affected. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD CVSS 3.1 score of 5.4 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N) classifies this as medium severity, but the Scope:Unchanged assignment warrants scrutiny - the described impact explicitly crosses from Keycloak into downstream relying-party applications, which is a textbook scope-change scenario. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who holds a delegated Keycloak administrator account - legitimately granted limited management rights over a specific client under FGAP v2 - calls the ClientResource admin API to enumerate and attach hidden client scopes that they are not authorized to view. The modified client now issues tokens to end-users that include those injected scopes; when those users present the tokens to downstream applications, the applications honor the unexpected scope claims and grant elevated access levels, effectively extending the attacker's permissions laterally across integrated services without ever directly compromising those services. |
| Remediation | Consult the Red Hat security advisory at https://access.redhat.com/security/cve/CVE-2026-14614 for the vendor-released patched version - no specific fix version was confirmed in the available intelligence data at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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View allVendor StatusVendor
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