{"id":"CVE-2026-55495","aliases":["GHSA-49h3-cwhj-4737","GO-2026-6097"],"url":"https://o3.security/vulnerability/CVE-2026-55495","summary":"Cloudreve: Path Traversal in WOPI PUT_RELATIVE Allows Arbitrary File Creation in Owner Account","details":"Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the WOPI PUT_RELATIVE handler passes X-WOPI-SuggestedTarget to URI.JoinRaw as a path rather than a filename, allowing slash and dot-dot segments to escape the source file directory and create or conditionally overwrite files elsewhere in the same owner account. This issue is fixed in version 4.17.0.","published":"2026-07-31T02:58:14.080Z","modified":"2026-08-18T15:10:37.942812212Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},"epss":{"score":0.0026,"percentile":0.17579,"asOf":"2026-09-06"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/cloudreve/Cloudreve/v4","fixedVersion":"4.0.0-20260613023150-7968e50429ef"},{"ecosystem":"Go","name":"github.com/cloudreve/Cloudreve/v3","fixedVersion":null}],"fix":{"url":"https://github.com/cloudreve/cloudreve/commit/7968e50429efab40ffa8f57fecdfbd5a73d23630","label":"cloudreve/cloudreve@7968e50"},"references":[{"type":"WEB","url":"https://github.com/cloudreve/cloudreve/releases/tag/4.17.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55495.json"},{"type":"ADVISORY","url":"https://github.com/cloudreve/cloudreve/security/advisories/GHSA-49h3-cwhj-4737"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55495"},{"type":"FIX","url":"https://github.com/cloudreve/cloudreve/commit/7968e50429efab40ffa8f57fecdfbd5a73d23630"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T15:10:37.942812212Z"}}