CVE-2025-23389: Rancher does not Properly Validate Account Bindings in SAML Authentication Enables User Impersonation on First Login

February 27, 2025 (updated March 13, 2025)

A vulnerability in Rancher has been discovered, leading to a local user impersonation through SAML Authentication on first login.

References

github.com/advisories/GHSA-mq23-vvg7-xfm4
github.com/rancher/rancher
github.com/rancher/rancher/security/advisories/GHSA-mq23-vvg7-xfm4
nvd.nist.gov/vuln/detail/CVE-2025-23389
pkg.go.dev/vuln/GO-2025-3490

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