{"id":"CVE-2026-25705","aliases":["GHSA-5v3h-x4wf-5c35","GO-2026-5154"],"url":"https://o3.security/vulnerability/CVE-2026-25705","summary":"Rancher Extensions have arbitrary file access via path traversal","details":"A vulnerability has been identified in [Rancher's Extensions](https://ranchermanager.docs.rancher.com/integrations-in-rancher/rancher-extensions) where malicious code can be injected in Rancher through a path traversal in the `compressedEndpoint` field inside a `UIPlugin` deployment. A malicious UI extension could abuse that to:  *  Overwrite Rancher binaries or configuration to inject code.\n\n  *  Write to /var/lib/rancher/ to tamper with cluster state.\n\n  *  If hostPath volumes are mounted, write to the host node filesystem.\n\n  *  Use this issue to chain with other attack vectors.","published":"2026-05-13T08:00:46.097Z","modified":"2026-08-07T11:31:08.137114209Z","cvss":{"score":8.4,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H"},"epss":{"score":0.00369,"percentile":0.29577,"asOf":"2026-08-08"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/rancher/rancher","fixedVersion":"2.14.1"},{"ecosystem":"Go","name":"github.com/rancher/rancher","fixedVersion":"2.13.5"},{"ecosystem":"Go","name":"github.com/rancher/rancher","fixedVersion":"2.12.9"},{"ecosystem":"Go","name":"github.com/rancher/rancher","fixedVersion":"2.11.13"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25705.json"},{"type":"ADVISORY","url":"https://github.com/rancher/rancher/security/advisories/GHSA-5v3h-x4wf-5c35"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25705"},{"type":"REPORT","url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25705"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:31:08.137114209Z"}}