GHSA-8hcx-p7m8-gc28: Duplicate Advisory Remote Code Execution Vulnerability

HIGH
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CVSS 7.3
CWE-266
Published
Advisory Summary

GHSA-8hcx-p7m8-gc28 is a HIGH (CVSS 7.3) remote code execution vulnerability (CWE-266: Incorrect Privilege Assignment) affecting Duplicate Advisory libraries in the Maven ecosystem. The issue involves keycloak has privilege escalation via improper scope mapping enforcement. Remediation is available by upgrading affected packages to version 26.6.4.

GHSA-8hcx-p7m8-gc28 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-8hcx-p7m8-gc28
Severity HIGH
CVSS v3.1 Base Score 7.3
CWE Classification CWE-266: Incorrect Privilege Assignment
Affected Product Duplicate Advisory
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required High (PR:H)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix GHSA-8hcx-p7m8-gc28

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.keycloak:keycloak-services fixed: 26.6.4 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-services</artifactId>
    <version>26.6.4</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.keycloak

How to Check if You Are Affected

To determine whether your Java application is affected by GHSA-8hcx-p7m8-gc28, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.keycloak

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 26.6.4), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.keycloak command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-266: Incorrect Privilege Assignment, where a product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-32h4-44jj-c5vx. This link is maintained to preserve external references. ### Original Description A flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client management permissions can exploit this vulnerability to assign any realm role, including highly privileged roles, to a client's scope mapping. This bypasses intended security controls, allowing the injected role to be projected into a user's authentication token when they access the modified client. This could lead to unauthorized privilege escalation within the Keycloak realm.

GHSA-8hcx-p7m8-gc28 Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
26.6.4
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-services
maven/org.keycloak/keycloak-services
Maven
< 26.6.4
26.6.4

References

NVD — GHSA-8hcx-p7m8-gc28 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9795
access.redhat.com/errata/rhsa-2026:30... WEB
https://access.redhat.com/errata/RHSA-2026:30049
access.redhat.com/errata/rhsa-2026:30... WEB
https://access.redhat.com/errata/RHSA-2026:30050
access.redhat.com/errata/rhsa-2026:30... WEB
https://access.redhat.com/errata/RHSA-2026:30083
access.redhat.com/errata/rhsa-2026:30... WEB
https://access.redhat.com/errata/RHSA-2026:30084
Duplicate Advisory Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-9795
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2482462
Duplicate Advisory Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9795.json

Frequently Asked Questions

What is GHSA-8hcx-p7m8-gc28?
GHSA-8hcx-p7m8-gc28 is a security vulnerability in Duplicate Advisory involving Keycloak has privilege escalation via improper scope mapping enforcement under CWE-266: Incorrect Privilege Assignment.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 26.6.4 across affected packages: org.keycloak:keycloak-services.
What version fixes GHSA-8hcx-p7m8-gc28?
Upgrading to 26.6.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-services affected?
Yes, org.keycloak:keycloak-services is affected in releases prior to 26.6.4. Upgrade your dependency to 26.6.4 or later.
What is the CVSS score of GHSA-8hcx-p7m8-gc28?
GHSA-8hcx-p7m8-gc28 has a CVSS v3.1 base score of 7.3 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N.
What CWE is associated with GHSA-8hcx-p7m8-gc28?
GHSA-8hcx-p7m8-gc28 is classified under CWE-266: Incorrect Privilege Assignment (A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.).
How can I check Maven dependencies for GHSA-8hcx-p7m8-gc28?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.keycloak'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8hcx-p7m8-gc28",
  "modified" : "2026-07-01T21:20:03Z",
  "published" : "2026-05-28T06:31:09Z",
  "withdrawn" : "2026-07-01T21:20:02Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Keycloak has privilege escalation via improper scope mapping enforcement",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-32h4-44jj-c5vx. This link is maintained to preserve external references.\n\n### Original Description\nA flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client management permissions can exploit this vulnerability to assign any realm role, including highly privileged roles, to a client's scope mapping. This bypasses intended security controls, allowing the injected role to be projected into a user's authentication token when they access the modified client. This could lead to unauthorized privilege escalation within the Keycloak realm.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-services"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "26.6.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-9795"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:30049"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:30050"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:30083"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:30084"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-9795"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2482462"
  }, {
    "type" : "WEB",
    "url" : "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9795.json"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-266" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-01T21:20:02Z",
    "nvd_published_at" : "2026-05-28T05:16:41Z"
  }
}