A vulnerability has been identified within Rancher Manager where a missing server-side validation on the `.username` field in Rancher can allow users with update permissions on other User resources to cause denial of access for targeted accounts.
https://github.com/rancher/rancher/security/advisories/GHSA-q82v-h4rq-5c86
Published: 2025-10-02
Updated: 2026-04-15
Named Vulnerability: GO-2025-3983Named Vulnerability: GHSA-q82v-h4rq-5c86
Base Score: 6.8
Vector: CVSS2#AV:N/AC:L/Au:M/C:N/I:P/A:C
Severity: Medium
Base Score: 7.6
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H
Severity: High
EPSS: 0.00481