CVE-2026-66878: multicloud-operators-subscription · Insecure Direct Object Reference
Source GCVE Database
Not known to be exploited · CVSS 7.7 High : patch Red Hat Advanced Cluster Management for Kubernetes 2.11 soon.
Data as of 9 Nov 2026, 23:24 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 12 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
Patches and advisories
- access.redhat.com/errata/RHSA-2026:60386 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60387 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60388 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60389 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60390 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60391 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red HatRed Hat Advanced Cluster Management for Kubernetes 2.11 | Affected– | Fixed in– |
| Red HatRed Hat Advanced Cluster Management for Kubernetes 2.13 | Affected– | Fixed in– |
| Red HatRed Hat Advanced Cluster Management for Kubernetes 2.14 | Affected– | Fixed in– |
| Red HatRed Hat Advanced Cluster Management for Kubernetes 2.15 | Affected– | Fixed in– |
| Red HatRed Hat Advanced Cluster Management for Kubernetes 2.16 | Affected– | Fixed in– |
| Red HatRed Hat Advanced Cluster Management for Kubernetes 2.17 | Affected– | Fixed in– |
AI-suggested
Red Hat has released security updates for Red Hat Advanced Cluster Management for Kubernetes version 2.17.1 that address this vulnerability. Users should apply this update and ensure all previously released relevant errata are applied. Refer to Red Hat's official advisory RHSA-2026:60386 for detailed update instructions.
Description
A vulnerability in multicloud-operators-subscription allows a privileged namespace administrator to disclose sensitive information by manipulating the Channel.Spec.SecretRef.Namespace field. This flaw enables copying secret contents from other namespaces into the attacker's namespace, leading to information disclosure. The issue affects Red Hat Advanced Cluster Management for Kubernetes and has a CVSS score of 7.7 (high severity).
References
- nvd.nist.gov/vuln/detail/CVE-2026-66878 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60386 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60387 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60388 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60389 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60390 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60391 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-66878 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2514226 (opens in a new tab)