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CVE record · CVE-2026-66878

Multicloud-operators-subscription: multicloud-operators-subscription: fetchchannelreferences honours channel.spec.secretref.namespace enabling cross-namespace secret exfiltration

CVSS 7.7 HighEPSS 0.0048 · 41st percentile

Published by the CVE Program (CNA: redhat) at 12 Aug 2026, 01:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 Package name: rhacm2/multicluster-operators-subscription-rhel9 https://catalog.redhat.com/software/containers/
  • unaffected 1787263584 to before * rpm
Other versions: affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.13 Package name: rhacm2/multicluster-operators-subscription-rhel9 https://catalog.redhat.com/software/containers/
  • unaffected 1787263693 to before * rpm
Other versions: affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14 Package name: rhacm2/multicluster-operators-subscription-rhel9 https://catalog.redhat.com/software/containers/
  • unaffected 1787170830 to before * rpm
Other versions: affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15 Package name: rhacm2/multicluster-operators-subscription-rhel9 https://catalog.redhat.com/software/containers/
  • unaffected 1787240030 to before * rpm
Other versions: affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16 Package name: rhacm2/multicluster-operators-subscription-rhel9 https://catalog.redhat.com/software/containers/
  • unaffected 1787242321 to before * rpm
Other versions: affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 Package name: rhacm2/multicluster-operators-subscription-rhel9 https://catalog.redhat.com/software/containers/
  • unaffected 1787242108 to before * rpm
Other versions: affected
Identifiers
CVE-2026-66878
CNA
redhat
Weakness (CWE)
CWE-639
Tags
Published
12 Aug 2026
Updated
5 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.7 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0048, the 41st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 12 Aug 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.