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Fencer Vulns
medium 6.4

CVE-2026-64927 json

Multicloud-operators-channel: multicloud-operators-channel: cross-namespace secret and configmap mutation via spec.secretref.namespace confused deputy

published 2026-08-12 2 mo ago modified 2026-10-24 15 d ago also EUVD-2026-57061

cvss
6.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

A flaw was found in the multicloud-operators-channel component. This vulnerability allows a user with specific permissions to manipulate how the system handles sensitive information, known as Secrets, across different parts of the system (namespaces). By exploiting this, an attacker can modify these Secrets in unauthorized areas. This could lead to unauthorized access to information or elevated privileges within the system.

Patch / fix

  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 1787260663
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.13 1787259310
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14 1787172840
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15 1787238600
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16 1787242105
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1787242099

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-64927 updated cvss 6.4

multicloud-operators-channel: multicloud-operators-channel: cross-namespace Secret and ConfigMap mutation via spec.secretRef.namespace confused deputy

  • Red Hat Advanced Cluster Management for Kubernetes 2.11 rhacm2/multicluster-operators-channel-rhel9 1787260663
    fixed: vendor fix RHSA-2026:60387
  • Red Hat Advanced Cluster Management for Kubernetes 2.13 rhacm2/multicluster-operators-channel-rhel9 1787259310
    fixed: vendor fix RHSA-2026:60390
  • Red Hat Advanced Cluster Management for Kubernetes 2.14 rhacm2/multicluster-operators-channel-rhel9 1787172840
    fixed: vendor fix RHSA-2026:60388
  • Red Hat Advanced Cluster Management for Kubernetes 2.15 rhacm2/multicluster-operators-channel-rhel9 1787238600
    fixed: vendor fix RHSA-2026:60389
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 rhacm2/multicluster-operators-channel-rhel9 1787242105
    fixed: vendor fix RHSA-2026:60391
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 rhacm2/multicluster-operators-channel-rhel9 1787242099
    fixed: vendor fix RHSA-2026:60386
  • Red Hat Advanced Cluster Management for Kubernetes 2.11 rhacm2/thanos-rhel9 1787685239, rhacm2/console-rhel9 1787687062, rhacm2/prometheus-rhel9 1787261499, rhacm2/acm-grafana-rhel9 1787682482, rhacm2/acm-search-v2-rhel9 1787688827, rhacm2/node-exporter-rhel9 1787263326, +34 more Red Hat Advanced Cluster Management for Kubernetes 2.13 rhacm2/thanos-rhel9 1787263906, rhacm2/acm-cli-rhel9 1787259085, rhacm2/console-rhel9 1787339249, rhacm2/prometheus-rhel9 1787263757, rhacm2/acm-grafana-rhel9 1787644958, rhacm2/acm-search-v2-rhel9 1787682112, +37 more Red Hat Advanced Cluster Management for Kubernetes 2.14 rhacm2/thanos-rhel9 1787614805, rhacm2/acm-cli-rhel9 1786923505, rhacm2/console-rhel9 1787339248, rhacm2/prometheus-rhel9 1786976997, rhacm2/acm-grafana-rhel9 1787645355, rhacm2/acm-search-v2-rhel9 1787682033, +37 more Red Hat Advanced Cluster Management for Kubernetes 2.15 rhacm2/thanos-rhel9 1787238739, rhacm2/acm-cli-rhel9 1787238522, rhacm2/console-rhel9 1787341780, rhacm2/prometheus-rhel9 1787238666, rhacm2/acm-grafana-rhel9 1787645007, rhacm2/acm-search-v2-rhel9 1787681674, +39 more Red Hat Advanced Cluster Management for Kubernetes 2.16 rhacm2/thanos-rhel9 1786909435, rhacm2/acm-cli-rhel9 1786908319, rhacm2/console-rhel9 1787339213, rhacm2/prometheus-rhel9 1786909036, rhacm2/acm-grafana-rhel9 1787645431, rhacm2/acm-search-v2-rhel9 1787681686, +40 more Red Hat Advanced Cluster Management for Kubernetes 2.17 rhacm2/thanos-rhel9 1787229716, rhacm2/acm-cli-rhel9 1787227626, rhacm2/console-rhel9 1787335105, rhacm2/prometheus-rhel9 1787230287, rhacm2/acm-grafana-rhel9 1787316467, rhacm2/acm-search-v2-rhel9 1787681651, +39 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Affected products

  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.13
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17

Classification

Weakness
  • CWE-639 Authorization Bypass Through User-Controlled Key

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.