{"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":"2026-09-29T03:08:21.988Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T03:08:11.300076Z","id":"CVE-2026-52850","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":"2026-09-29T03:08:21.988Z"}}]}}