{"schemaVersion":3,"id":"CVE-2026-45275","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results in an authorization bypass and privilege escalation, allowing unauthorized distribution of restricted files. This issue has been patched in version 2.7.2.","dates":{"published":"2026-06-01T16:51:22.429Z","modified":"2026-06-01T19:31:53.967Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00488,"percentile":0.40803,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.13,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00358},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00488,"percentile":0.40803}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00488,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00488,"percentile":0.40803}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-285","name":"Improper Authorization","description":"The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/285.html"}],"affected":[{"vendor":"nextcloud","product":"approval","name":"approval","label":"approval","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2.7.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.7.2","eol":null,"hubHref":"/vendor/nextcloud/approval"},{"vendor":"nextcloud","product":"security-advisories","name":"security-advisories","label":"security-advisories","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2.7.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.7.2","eol":null,"hubHref":"/vendor/nextcloud/security-advisories"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v8q8-w6c3-3gv9","label":"github.com/nextcloud/security-advisories/security/advisories/GHSA-v8q8-w6c3-3gv9","hostname":"github.com","tags":["X Refsource CONFIRM","Mitigation","Vendor Advisory"]},{"url":"https://github.com/nextcloud/approval/pull/392","label":"github.com/nextcloud/approval/pull/392","hostname":"github.com","tags":["X Refsource MISC","Issue Tracking","Patch"]},{"url":"https://hackerone.com/reports/3593780","label":"hackerone.com/reports/3593780","hostname":"hackerone.com","tags":["X Refsource MISC","Permissions Required"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-06-01T16:51:22.429Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-01T19:31:53.967Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T07:18:02.978Z","stale":false,"partial":false}}