# Duplicate Advisory: Keycloak allows unauthorized access to resources via uma permission ticket bypass

Source: https://junglewise.ai/threats/duplicate-advisory-keycloak-allows-unauthorized-access-to-resources-via-1f5f5b83  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-25  
License: CC BY 4.0 with a link back

Severity: medium · CVSS 4.6 · Published 2026-06-25

### Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-w3p3-7cjg-vgfw. This link is maintained to preserve external references.

### Original Description
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.

Technologies: [org.keycloak:keycloak-services (Maven)](https://junglewise.ai/threats/technologies/org-keycloak-keycloak-services). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Medium severity, with a CVSS score of 4.6, published 25 June 2026.

**Which products and versions are affected?** org.keycloak:keycloak-services (Maven) < 26.6.4, ECOSYSTEM:introduced=0.

**Is there a fix for This vulnerability?** 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.

**Am I affected?** Check whether you run org.keycloak:keycloak-services (Maven) at an affected version. 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.

## Affected products

- org.keycloak:keycloak-services (Maven) < 26.6.4, ECOSYSTEM:introduced=0

## Related threats

- [Keycloak unauthenticated account takeover via reset-credentials bypass](https://junglewise.ai/threats/cve-2026-18963-siemens-industrial-edge-management-authentication-bypass-in)
- [Duplicate Advisory: Authentication bypass via jwt algorithm confusion](https://junglewise.ai/threats/duplicate-advisory-authentication-bypass-via-jwt-algorithm-confusion-40489dee)
- [Keycloak JWT algorithm confusion in JWT Authorization Grant flow](https://junglewise.ai/threats/cve-2026-11800-keycloak-jwt-algorithm-confusion-in-jwt-authorization-grant-flow)
- [Duplicate Advisory: Keycloak vulnerable to authorization bypass via incorrect uri comparison](https://junglewise.ai/threats/duplicate-advisory-keycloak-vulnerable-to-authorization-bypass-via-009d6a49)
- [Duplicate Advisory: Keycloak vulnerable to cross-site scripting (xss) via case-insensitive uri validation bypass](https://junglewise.ai/threats/duplicate-advisory-keycloak-vulnerable-to-cross-site-scripting-xss-via-1687acae)