Submariner-operator: release workflow consumes same-org composite action via mutable @devel branch ref

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-66783
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-18 17:17:00 UTC
Updated2026-09-03 13:06:00 UTC
DescriptionA flaw was found in the `submariner-operator` component of Red Hat Advanced Cluster Management for Kubernetes. This vulnerability allows a cluster administrator, or any user with permissions to modify the Submariner Custom Resource (CR), to specify an unvalidated image path. This lack of validation enables an attacker to execute arbitrary code with elevated privileges across the entire cluster, including control-plane nodes, by deploying a malicious image.

Risk And Classification

Primary CVSS: v3.1 4.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

EPSS: 0.002770000 probability, percentile 0.198560000 (date 2026-09-07)

Problem Types: CWE-1357 | CWE-1357 Reliance on Insufficiently Trustworthy Component

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
3.1CNACVSS4.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Advanced Cluster Management For Kubernetes 2.17 unaffected 1788105072 * rpm Not specified
CNA Red Hat Red Hat Advanced Cluster Management For Kubernetes 2.17 unaffected 1788073481 * rpm Not specified
CNA Red Hat Red Hat Advanced Cluster Management For Kubernetes 2 Not specified Not specified
CNA Red Hat Red Hat Advanced Cluster Management For Kubernetes 2 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/security/cve/CVE-2026-66783 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:63016 [email protected] access.redhat.com
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2026-07-27T00:00:00.000ZReported to Red Hat.
CNA2026-08-18T16:35:00.000ZMade public.

Workarounds

CNA: To mitigate this issue, restrict access to cluster-admin roles and carefully control permissions for users or service accounts that can modify Submariner Custom Resources. Ensure that only trusted and authorized personnel have the ability to patch Submariner CRs, thereby preventing the injection of malicious images.

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