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Vulnerabilities CVE-2026-44945

CVE-2026-44945

Critical
Open
TLP:CLEAR

Cross-Cluster Impersonation Confused-Deputy Privilege Escalation

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Description

A 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.

Details

CVSS Score
9.1
EPSS Score
0.30%

22.8th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Confidence
90%
Published
Aug 5, 2026
Last Modified
Aug 6, 2026
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