{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-62323","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-13T19:27:58.315Z","datePublished":"2026-07-31T03:43:14.900Z","dateUpdated":"2026-07-31T19:28:19.622Z"},"containers":{"cna":{"title":"Cloudreve: Unauthorized file write via WOPI view sessions whose access token secret is ignored","problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/cloudreve/cloudreve/security/advisories/GHSA-c3jm-gv5r-9wcp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/cloudreve/cloudreve/security/advisories/GHSA-c3jm-gv5r-9wcp"},{"name":"https://github.com/cloudreve/cloudreve/commit/f3347130ac48f2ff996af9ef66c97be2dda9cba9","tags":["x_refsource_MISC"],"url":"https://github.com/cloudreve/cloudreve/commit/f3347130ac48f2ff996af9ef66c97be2dda9cba9"},{"name":"https://github.com/cloudreve/cloudreve/releases/tag/4.17.0","tags":["x_refsource_MISC"],"url":"https://github.com/cloudreve/cloudreve/releases/tag/4.17.0"}],"affected":[{"vendor":"cloudreve","product":"cloudreve","versions":[{"version":"< 4.17.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-31T03:43:14.900Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-c3jm-gv5r-9wcp","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/cloudreve/cloudreve/security/advisories/GHSA-c3jm-gv5r-9wcp","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-31T19:27:35.115914Z","id":"CVE-2026-62323","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-31T19:28:19.622Z"}}]}}