{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-71403","sourceIdentifier":"meissner@suse.de","published":"2026-09-03T15:17:32.180","lastModified":"2026-09-18T15:03:02.433","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"A flaw was found in Rancher Manager. The /v3/users update path did not enforce immutability of a User resource's `username` and `principalIds` fields. A user holding the `update` verb on `users.management.cattle.io` could inject a foreign identity provider principal into any account, so that the next login by the owner of that principal was bound to the victim's account and inherited its role bindings.\n\n\nThis issue affects Rancher: before 2.15.1."}],"affected":[{"source":"meissner@suse.de","affectedData":[{"vendor":"SUSE","product":"Rancher","defaultStatus":"unaffected","modules":["Manager"],"repo":"https://github.com/rancher/rancher","versions":[{"version":"0","lessThan":"2.15.1","versionType":"semver","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"meissner@suse.de","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":0.9,"impactScore":5.2},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":0.9,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-03T00:00:00+00:00","id":"CVE-2026-71403","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"meissner@suse.de","type":"Secondary","description":[{"lang":"en","value":"CWE-639"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*","versionEndExcluding":"2.15.1","matchCriteriaId":"C911F079-FC7A-48EB-9A06-C86AFC6FC1AD"}]}]}],"references":[{"url":"https://github.com/rancher/rancher/pull/56616","source":"meissner@suse.de","tags":["Issue Tracking","Patch"]}]}}