Summary
Keycloak Affected by Broken Access Control Vulnerability in the UserManagedPermissionService
A flaw was found in Keycloak. A significant Broken Access Control vulnerability exists in the UserManagedPermissionService (UMA Protection API). When updating or deleting a UMA policy associated with multiple resources, the authorization check only verifies the caller's ownership against the first resource in the policy's list. This allows a user (Owner A) who owns one resource (RA) to update a shared policy and modify authorization rules for other resources (e.g., RB) in that same policy, even if those other resources are owned by a different user (Owner B). This constitutes a horizontal privilege escalation.
Impact
CVE-2025-14778 has a CVSS score of 5.4 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (26.2.13, 26.5.3, 26.4.9); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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org.keycloak:keycloak-services to 26.2.13 or later; org.keycloak:keycloak-services to 26.5.3 or later; org.keycloak:keycloak-services to 26.4.9 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2025-14778? CVE-2025-14778 is a medium-severity security vulnerability in org.keycloak:keycloak-services (maven), affecting versions < 26.2.13. It is fixed in 26.2.13, 26.5.3, 26.4.9.
- How severe is CVE-2025-14778? CVE-2025-14778 has a CVSS score of 5.4 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of org.keycloak:keycloak-services are affected by CVE-2025-14778? org.keycloak:keycloak-services (maven) versions < 26.2.13 is affected.
- Is there a fix for CVE-2025-14778? Yes. CVE-2025-14778 is fixed in 26.2.13, 26.5.3, 26.4.9. Upgrade to this version or later.
- Is CVE-2025-14778 exploitable, and should I be worried? Whether CVE-2025-14778 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2025-14778 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2025-14778?
- Upgrade
org.keycloak:keycloak-servicesto 26.2.13 or later - Upgrade
org.keycloak:keycloak-servicesto 26.5.3 or later - Upgrade
org.keycloak:keycloak-servicesto 26.4.9 or later
- Upgrade