{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-66878","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","state":"PUBLISHED","assignerShortName":"redhat","dateReserved":"2026-08-11T17:40:07.965Z","datePublished":"2026-08-12T01:10:38.957Z","dateUpdated":"2026-09-05T14:23:45.964Z"},"containers":{"cna":{"title":"Multicloud-operators-subscription: multicloud-operators-subscription: fetchchannelreferences honours channel.spec.secretref.namespace enabling cross-namespace secret exfiltration","metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"format":"CVSS"}],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Advanced Cluster Management for Kubernetes 2.11","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhacm2/multicluster-operators-subscription-rhel9","defaultStatus":"affected","versions":[{"version":"1787263584","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:acm:2.11::el9"]},{"vendor":"Red Hat","product":"Red Hat Advanced Cluster Management for Kubernetes 2.13","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhacm2/multicluster-operators-subscription-rhel9","defaultStatus":"affected","versions":[{"version":"1787263693","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:acm:2.13::el9"]},{"vendor":"Red Hat","product":"Red Hat Advanced Cluster Management for Kubernetes 2.14","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhacm2/multicluster-operators-subscription-rhel9","defaultStatus":"affected","versions":[{"version":"1787170830","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:acm:2.14::el9"]},{"vendor":"Red Hat","product":"Red Hat Advanced Cluster Management for Kubernetes 2.15","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhacm2/multicluster-operators-subscription-rhel9","defaultStatus":"affected","versions":[{"version":"1787240030","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:acm:2.15::el9"]},{"vendor":"Red Hat","product":"Red Hat Advanced Cluster Management for Kubernetes 2.16","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhacm2/multicluster-operators-subscription-rhel9","defaultStatus":"affected","versions":[{"version":"1787242321","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:acm:2.16::el9"]},{"vendor":"Red Hat","product":"Red Hat Advanced Cluster Management for Kubernetes 2.17","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhacm2/multicluster-operators-subscription-rhel9","defaultStatus":"affected","versions":[{"version":"1787242108","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:acm:2.17::el9"]}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:60386","name":"RHSA-2026:60386","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:60387","name":"RHSA-2026:60387","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:60388","name":"RHSA-2026:60388","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:60389","name":"RHSA-2026:60389","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:60390","name":"RHSA-2026:60390","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:60391","name":"RHSA-2026:60391","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-66878","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2514226","name":"RHBZ#2514226","tags":["issue-tracking","x_refsource_REDHAT"]}],"datePublic":"2026-08-11T00:00:00.000Z","problemTypes":[{"descriptions":[{"cweId":"CWE-639","description":"Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}]}],"x_redhatCweChain":"CWE-639: Authorization Bypass Through User-Controlled Key","workarounds":[{"lang":"en","value":"Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}],"timeline":[{"lang":"en","time":"2026-08-11T00:00:00.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-08-11T00:00:00.000Z","value":"Made public."}],"providerMetadata":{"orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat","dateUpdated":"2026-09-05T14:23:45.964Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T15:14:56.506658Z","id":"CVE-2026-66878","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-13T15:15:14.012Z"}}]}}