{"id":"CVE-2026-55997","published":"2026-08-05T08:16:34.330","lastModified":"2026-08-06T05:17:04.460","description":"Rancher issues long-lived registration tokens to authenticate nodes and agents joining a downstream cluster. These tokens were stored and exposed in plaintext with no expiration, so a malicious user could obtain one either through the Rancher API, etcd, stored automation, or direct file access on a node, and could use it at any time to register a rogue node into the cluster.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwes":["CWE-312"],"vendors":[],"products":[],"references":[{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55997","tags":[]},{"url":"https://github.com/rancher/rancher/security/advisories/GHSA-7r53-jvhg-9jq4","tags":[]}],"exploitRefs":[{"url":"https://github.com/rancher/rancher/security/advisories/GHSA-7r53-jvhg-9jq4","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows a malicious user to obtain long-lived registration tokens in plaintext, enabling unauthorized node registration and potential cluster compromise.","exploitability":"Exploitation is relatively easy given access to the Rancher API or file system; preconditions include having obtained a token through one of the disclosed methods.","blast_radius":"If exploited, this could lead to significant damage, including unauthorized control over the entire downstream cluster and potential data breaches.","remediation":"Implement token expiration for registration tokens immediately to mitigate the risk.","tags":["auth-bypass","api-exploit","token-management","cluster-security"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T06:47:15.309Z"}}