{"schema":"threatline.record/2","record":{"id":"CVE-2026-52850","aliases":["GHSA-5vhf-cgf2-c9cq"],"summary":"Docmost: Broken access control in transclusion lookup API leaks sync-block content across private spaces","details":"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.","categories":["Unclassified"],"product":"docmost","vendor":"docmost","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-52850","source_modified_at":"2026-09-29T03:08:21.988Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"docmost","vendor":"docmost","versions":[{"version":"< 0.90.1","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":4.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00193,"percentile":0.08482,"score_date":"2026-10-23"},"published_at":"2026-09-24T18:30:06.702Z","modified_at":"2026-09-29T03:08:21.988Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-52850","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-29T03:08:21.988Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-52850","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/docmost/docmost/security/advisories/GHSA-5vhf-cgf2-c9cq","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/docmost/docmost/commit/830b5b4d458a1302f42c8b68bff9ff559f6eb342","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/docmost/docmost/releases/tag/v0.90.1","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-09-29T03:08:11.300076Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-29T03:08:21.988Z","content_hash":"3bd057fd605eb9c965462cb3e99729104288194bc22b5c0a48e7479b291ea108"}}