PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-66792 Red Hat CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-17T19:16:34.237Z and has not been modified since then. The multicloud-operators-subscription component has a flaw that allows a user on a managed cluster to escalate their privileges by creating a Subscription with specific, crafted annotations. Successful exploitation grants the attacker the ability to deploy resources into any namespace with the elevated permissions of the controller's Service Account, potentially leading to unauthorized access and control over cluster resources. Administrators and users of the multicloud-operators-subscription component, especially those with managed clusters, should be aware of this critical vulnerability and take immediate action to assess and mitigate the risk. This vulnerability has a critical CVSS score of 9.9 and allows for privilege escalation and potential unauthorized access to cluster resources. Immediate attention is required to assess and mitigate the risk.

Vendor
Red Hat
Product
multicloud-operators-subscription
CVSS
CRITICAL 9.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-17
Original CVE updated
2026-08-27
Advisory published
2026-08-17
Advisory updated
2026-08-27

Who should care

Administrators and users of the multicloud-operators-subscription component, especially those with managed clusters, should be aware of this critical vulnerability and take immediate action to assess and mitigate the risk.

Technical summary

The multicloud-operators-subscription component has a flaw that allows a user on a managed cluster to escalate their privileges by creating a Subscription with specific, crafted annotations. Successful exploitation grants the attacker the ability to deploy resources into any namespace with the elevated permissions of the controller's Service Account, potentially leading to unauthorized access and control over cluster resources.

Defensive priority

This vulnerability has a critical CVSS score of 9.9 and allows for privilege escalation and potential unauthorized access to cluster resources. Immediate attention is required to assess and mitigate the risk.

Recommended defensive actions

  • Review and assess the vulnerability's impact on your environment
  • Verify if your systems are affected by checking the multicloud-operators-subscription component version
  • Apply patches or updates provided by the vendor to mitigate the vulnerability
  • Monitor system activity for potential exploitation attempts
  • Implement compensating controls to limit the attack surface

Evidence notes

The CVE-2026-66792 record indicates a critical vulnerability in the multicloud-operators-subscription component, allowing for privilege escalation. Evidence is based on official CVE and NVD records, as well as references from Red Hat. However, the vendor and product names are not confirmed, and further verification is needed.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-66792 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-66792

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-66792 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-66792

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.