GHSA-q4gv-pjmh-c735

Source

https://github.com/advisories/GHSA-q4gv-pjmh-c735

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-q4gv-pjmh-c735/GHSA-q4gv-pjmh-c735.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-q4gv-pjmh-c735

Aliases

CVE-2026-4740
GO-2026-5564

Published

2026-04-07T15:30:52Z

Modified

2026-06-25T23:11:37Z

Severity

8.2 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator

Summary

Open Cluster Management (OCM): Cross-cluster privilege escalation via improper Kubernetes client certificate renewal validation

Details

A flaw was found in Open Cluster Management (OCM), the technology underlying Red Hat Advanced Cluster Management (ACM). Improper validation of Kubernetes client certificate renewal allows a managed cluster administrator to forge a client certificate that can be approved by the OCM controller. This enables cross-cluster privilege escalation and may allow an attacker to gain control over other managed clusters, including the hub cluster.

Database specific

{
    "cwe_ids":  [
        "CWE-295"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-04-08T19:13:58Z",
    "nvd_published_at":  "2026-04-07T15:17:46Z",
    "severity":  "HIGH"
}

References

Affected packages

Go / open-cluster-management.io/ocm

Package

Name: open-cluster-management.io/ocm; View open source insights on deps.dev
Purl: pkg:golang/open-cluster-management.io/ocm

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.2.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-q4gv-pjmh-c735/GHSA-q4gv-pjmh-c735.json"