{"cve":"CVE-2026-62323","nvd":{"published":"2026-07-31T04:17:24.160","modified":"2026-09-08T20:51:43.490","status":"Deferred","description":"Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, ViewerSessionValidation uses only the session-id prefix of a WOPI access token and does not enforce the requested viewer action, allowing a malicious or compromised WOPI viewer with a view session to forge the token suffix and invoke WOPI write routes for the underlying file. This issue is fixed in version 4.17.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:N","score":6.3},"cwes":["CWE-863"],"references":["https://github.com/cloudreve/cloudreve/commit/f3347130ac48f2ff996af9ef66c97be2dda9cba9","https://github.com/cloudreve/cloudreve/releases/tag/4.17.0","https://github.com/cloudreve/cloudreve/security/advisories/GHSA-c3jm-gv5r-9wcp","https://github.com/cloudreve/cloudreve/security/advisories/GHSA-c3jm-gv5r-9wcp"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-62323","score":0.00306,"percentile":0.23434,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c3jm-gv5r-9wcp","url":"https://osv.dev/vulnerability/GHSA-c3jm-gv5r-9wcp","summary":"Cloudreve WOPI view sessions can write files and WOPI access token secret is ignored","modified":"2026-08-18T15:10:31.897290685Z","packages":[{"ecosystem":"Go","name":"github.com/cloudreve/Cloudreve/v4","purl":"pkg:golang/github.com/cloudreve/Cloudreve/v4","ranges":["<4.0.0-20260626022433-f3347130ac48"],"fixed":["4.0.0-20260626022433-f3347130ac48"]},{"ecosystem":"Go","name":"github.com/cloudreve/Cloudreve/v3","purl":"pkg:golang/github.com/cloudreve/Cloudreve/v3","ranges":["<=3.0.0-20250225100611-da4e44b77af4"],"fixed":[]}]},{"id":"GO-2026-6104","url":"https://osv.dev/vulnerability/GO-2026-6104","summary":"Cloudreve WOPI view sessions can write files and WOPI access token secret is ignored in github.com/cloudreve/Cloudreve","modified":"2026-08-18T15:00:14.533043694Z","packages":[{"ecosystem":"Go","name":"github.com/cloudreve/Cloudreve","purl":"pkg:golang/github.com/cloudreve/Cloudreve","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/cloudreve/Cloudreve/v3","purl":"pkg:golang/github.com/cloudreve/Cloudreve/v3","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/cloudreve/Cloudreve/v4","purl":"pkg:golang/github.com/cloudreve/Cloudreve/v4","ranges":["<4.0.0-20260626022433-f3347130ac48"],"fixed":["4.0.0-20260626022433-f3347130ac48"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}