Cross-Cluster Impersonation Confused-Deputy Privilege Escalation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-44945
StatePUBLISHED
Assignersuse
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-05 10:17:27 UTC
Updated2026-08-06 05:17:03 UTC
DescriptionA privilege escalation vulnerability exists in Rancher's impersonation middleware (pkg/auth/requests/impersonate.go). An authenticated Rancher user with the default user global role can gain full administrative access to the Rancher control plane and transitively to all downstream clusters it manages. This issue affects Rancher: from 2.11.0 before 2.11.16, from 2.12.0 before 2.12.12, from 2.13.0 before 2.13.8, and from 2.14.0 before 2.14.2.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

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

EPSS: 0.003030000 probability, percentile 0.226480000 (date 2026-08-09)

Problem Types: CWE-441 | CWE-497 | CWE-441 CWE-441: Unintended Proxy or Intermediary ('Confused Deputy') | CWE-497 CWE-497 Exposure of sensitive system information to an unauthorized control sphere

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
3.1CNACVSS9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SUSE Rancher affected 2.11.0 2.11.16 semver Not specified
CNA SUSE Rancher affected 2.12.0 2.12.12 semver Not specified
CNA SUSE Rancher affected 2.13.0 2.13.8 semver Not specified
CNA SUSE Rancher affected 2.14.0 2.14.2 semver Not specified

References

ReferenceSourceLinkTags
bugzilla.suse.com/show_bug.cgi [email protected] bugzilla.suse.com
github.com/rancher/rancher/pull/55983 [email protected] github.com
github.com/rancher/rancher/security/advisories/GHSA-v584-7w32-jwpq [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: This vulnerability was discovered and reported by @BenTheCyberOne. (en)

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