{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52850", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-08T18:41:27.724Z", "datePublished": "2026-09-24T18:30:06.702Z", "dateUpdated": "2026-09-24T18:30:06.702Z"}, "containers": {"cna": {"title": "Docmost: Broken access control in transclusion lookup API leaks sync-block content across private spaces", "problemTypes": [{"descriptions": [{"cweId": "CWE-639", "lang": "en", "description": "CWE-639: Authorization Bypass Through User-Controlled Key", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-862", "lang": "en", "description": "CWE-862: Missing Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/docmost/docmost/security/advisories/GHSA-5vhf-cgf2-c9cq", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/docmost/docmost/security/advisories/GHSA-5vhf-cgf2-c9cq"}, {"name": "https://github.com/docmost/docmost/commit/830b5b4d458a1302f42c8b68bff9ff559f6eb342", "tags": ["x_refsource_MISC"], "url": "https://github.com/docmost/docmost/commit/830b5b4d458a1302f42c8b68bff9ff559f6eb342"}, {"name": "https://github.com/docmost/docmost/releases/tag/v0.90.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/docmost/docmost/releases/tag/v0.90.1"}], "affected": [{"vendor": "docmost", "product": "docmost", "versions": [{"version": "< 0.90.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-24T18:30:06.702Z"}, "descriptions": [{"lang": "en", "value": "Docmost is open-source collaborative wiki and documentation software. Prior to 0.90.1, an authenticated workspace member who does not belong to a private space can call the transclusion / sync-block lookup API with a known sourcePageId and transclusionId pair because the lookup does not enforce private space membership before resolving the source page. The API can return confidential sync-block content and source page metadata even though the normal page APIs deny access to the same page. This issue is fixed in version 0.90.1."}], "source": {"advisory": "GHSA-5vhf-cgf2-c9cq", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "docmost", "vendor": "docmost", "versions": [{"status": "affected", "version": "< 0.90.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Docmost is open-source collaborative wiki and documentation software. Prior to 0.90.1, an authenticated workspace member who does not belong to a private space can call the transclusion / sync-block lookup API with a known sourcePageId and transclusionId pair because the lookup does not enforce private space membership before resolving the source page. The API can return confidential sync-block content and source page metadata even though the normal page APIs deny access to the same page. This issue is fixed in version 0.90.1."}], "id": "CVE-2026-52850", "lastModified": "2026-09-24T19:17:14.060", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-24T19:17:13.930", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/docmost/docmost/commit/830b5b4d458a1302f42c8b68bff9ff559f6eb342"}, {"source": "security-advisories@github.com", "url": "https://github.com/docmost/docmost/releases/tag/v0.90.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/docmost/docmost/security/advisories/GHSA-5vhf-cgf2-c9cq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}, {"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}