{"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": "2026-06-01T16:39:38.836Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-45159", "lastModified": "2026-06-01T18:14:29.087", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.1, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-06-01T17:17:09.550", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/nextcloud/end_to_end_encryption/pull/1395"}, {"source": "security-advisories@github.com", "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p3qw-7gwx-wg24"}, {"source": "security-advisories@github.com", "url": "https://hackerone.com/reports/3304830"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}