What is CVE-2026-66878?

CVE-2026-66878 is a high-severity vulnerability in Red Hat Advanced Cluster Management For Kubernetes 2, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.7/10. Published 2026-08-12.

How severe is CVE-2026-66878?

High severity. CVSS v3 base score is 7.7 out of 10.

Auth bypass in Red Hat Advanced Cluster Management For Kubernetes 2

CVE-2026-66878

A flaw was found in multicloud-operators-subscription. A privileged user, specifically a namespace administrator capable of creating Channel and Subscription resources, can exploit this vulnerability. By manipulating the Channel.Spec.Secre…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Red Hat Advanced Cluster Management For Kubernetes 2

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-66878?: CVE-2026-66878 is a high-severity vulnerability in Red Hat Advanced Cluster Management For Kubernetes 2, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.7/10. Published 2026-08-12.
How severe is CVE-2026-66878?: High severity. CVSS v3 base score is 7.7 out of 10.