What is CVE-2026-76827?

CVE-2026-76827 is a medium-severity vulnerability in Red Hat Advanced Cluster Management For Kubernetes 2, classified under Protection Mechanism Failure. CVSS score: 6.8/10. Published 2026-08-19.

How severe is CVE-2026-76827?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Red Hat Advanced Cluster Management For Kubernetes 2

CVE-2026-76827

A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster's prefix.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N.

Affected products

Red Hat Advanced Cluster Management For Kubernetes 2

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

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

Frequently asked questions

What is CVE-2026-76827?: CVE-2026-76827 is a medium-severity vulnerability in Red Hat Advanced Cluster Management For Kubernetes 2, classified under Protection Mechanism Failure. CVSS score: 6.8/10. Published 2026-08-19.
How severe is CVE-2026-76827?: Medium severity. CVSS v3 base score is 6.8 out of 10.