Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-44945
- https://github.com/rancher/rancher/pull/55983
- https://github.com/rancher/rancher/security/advisories/GHSA-v584-7w32-jwpq
FAQ
What is CVE-2026-44945?
CVE-2026-44945 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 adm...
How severe is CVE-2026-44945?
CVE-2026-44945 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-44945?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.