{"id":"CVE-2026-68586","revision":"f7a13dcc7d294243bb5ea84e780a9bf6","records":[{"revision":"f7a13dcc7d294243bb5ea84e780a9bf6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68586","aliases":[],"title":"SiYuan before v3.7.3 Content Disclosure via getBacklinkDoc","description":"SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publish-forbidden documents, the content endpoints (gated only by CheckAuth) do not. A publish-mode reader — including an anonymous reader when publish Basic Auth is disabled — can call these endpoints directly with a publish-forbidden document's ID to retrieve its rendered DOM content and to determine whether the document references a given block (a reference-existence oracle).","state":0,"publishedAt":"2026-08-03T13:20:37.841+00:00","modifiedAt":"2026-08-14T16:51:08.199+00:00","affected":[{"ecosystem":"Vendor product","name":"siyuan","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"siyuan-note\",\n                    \"product\": \"siyuan\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/github.com/siyuan-note/siyuan/kernel\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.7.3\"\n                        },\n                        {\n                            \"version\": \"3.7.3\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","score":9.2,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6,"severity":"HIGH"}],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-36v8-mpjm-8j5r","https://www.vulncheck.com/advisories/siyuan-before-content-disclosure-via-getbacklinkdoc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68586","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68586","identifiers":["CVE-2026-68586"]},"retained":false,"historicalAffected":[]}],"coverage":[]}