CVE-2026-66878Multicloud-operators-subscription: multicloud-operators-subscription: fetchchannelreferences honours channel.spec.secretref.namespace enabling cross-namespace secret exfiltration
Updated under an hour ago ()
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It affects Red Hat Advanced Cluster Management for Kubernetes 2.11. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.SecretRef.Namespace field, the user can cause the system to copy sensitive Secret contents from other namespaces into their own, leading to information disclosure.
- CVSS
- 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
from 1787263584 not affected | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:60386vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:60387vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:60388vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:60389vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:60390vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:60391vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-66878vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2514226issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.