Is CVE-2026-118947 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-118947 being exploited in the wild.

How severe is CVE-2026-118947?

Medium severity, with a CVSS score of 4.3, published 30 October 2026.

Is there a fix for CVE-2026-118947?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-118947 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-118947?

Check whether you run Red Hat Keycloak. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-118947: Keycloak authorization bypass in UMA resource registration

CVE-2026-118947 · Severity: medium · CVSS 4.3 · Published 2026-10-30

Keycloak is an open-source identity and access management platform used to control who can access corporate applications and data. A flaw in its resource authorization feature allows an authenticated user with specific permissions to modify resources they don't own, potentially exposing or altering sensitive access configurations.

Technologies: Red Hat Keycloak. Vendors: Red Hat.

Quick answers

Is CVE-2026-118947 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-118947 being exploited in the wild.
How severe is CVE-2026-118947?: Medium severity, with a CVSS score of 4.3, published 30 October 2026.
Which products and versions are affected?: Red Hat Keycloak.
Is there a fix for CVE-2026-118947?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-118947 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-118947?: Check whether you run Red Hat Keycloak. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an insecure direct object reference (IDOR) in the UMA resource registration endpoint, caused by a missing ownership check. An authenticated attacker with the uma_protection role can update resources they do not own by providing a target resource ID in the request, allowing modification of resource names, URIs, and scopes. The attack requires valid credentials and knowledge of the target resource ID.

Affected products

Red Hat Keycloak

Timeline

2026-10-30: disclosed

References

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