{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45159","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-08T20:44:38.965Z","datePublished":"2026-06-01T16:39:38.836Z","dateUpdated":"2026-06-01T19:30:25.192Z"},"containers":{"cna":{"title":"Nextcloud: Files drop share links for end-to-end encrypted folders allowed to drop files into other folders of the share owner","problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p3qw-7gwx-wg24","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p3qw-7gwx-wg24"},{"name":"https://github.com/nextcloud/end_to_end_encryption/pull/1395","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/end_to_end_encryption/pull/1395"},{"name":"https://hackerone.com/reports/3304830","tags":["x_refsource_MISC"],"url":"https://hackerone.com/reports/3304830"}],"affected":[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":">= 1.15.0, < 1.15.4","status":"affected"},{"version":">= 1.16.0, < 1.16.3","status":"affected"},{"version":">= 1.17.0, < 1.17.1","status":"affected"},{"version":">= 1.18.0, < 1.18.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-06-01T16:39:38.836Z"},"descriptions":[{"lang":"en","value":"Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7."}],"source":{"advisory":"GHSA-p3qw-7gwx-wg24","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-01T19:30:14.088508Z","id":"CVE-2026-45159","options":[{"Exploitation":"none"},{"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":"2026-06-01T19:30:25.192Z"}}]}}