{"id":"CVE-2026-45275","state":"PUBLISHED","title":"Nextcloud: Authorization bypass in approval feature allows unauthorized file sharing with approvers","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.","publishedAt":"2026-06-01T16:51:22.429Z","updatedAt":"2026-06-01T19:31:53.967Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["nextcloud security-advisories"],"affected":[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":"< 2.7.2","status":"affected"}]}],"references":["https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v8q8-w6c3-3gv9","https://github.com/nextcloud/approval/pull/392","https://hackerone.com/reports/3593780"],"weaknesses":["CWE-285"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45275.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45275","state":"PUBLISHED","datePublished":"2026-06-01T16:51:22.429Z","dateUpdated":"2026-06-01T19:31:53.967Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-11T18:41:13.157Z"},"containers":{"cna":{"title":"Nextcloud: Authorization bypass in approval feature allows unauthorized file sharing with approvers","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":"< 2.7.2","status":"affected"}]}],"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v8q8-w6c3-3gv9","name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v8q8-w6c3-3gv9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/nextcloud/approval/pull/392","name":"https://github.com/nextcloud/approval/pull/392","tags":["x_refsource_MISC"]},{"url":"https://hackerone.com/reports/3593780","name":"https://hackerone.com/reports/3593780","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-285","lang":"en","description":"CWE-285: Improper Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-01T16:51:22.429Z"},"source":{"advisory":"GHSA-v8q8-w6c3-3gv9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-01T19:31:41.793146Z","id":"CVE-2026-45275","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-01T19:31:53.967Z"}}]}}}