{"schemaVersion":3,"id":"CVE-2026-87808","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"SiYuan versions <= 3.8.1 contain an incomplete fix for CVE-2026-32767 (GHSA-j7wh-x834-p3r7). The prior fix (commit d5e2d0bc) added an administrator check for SQL mode (method=2) in POST /api/search/fullTextSearchBlock, but the endpoint still does not enforce the application's read-only boundary: for method=2 it forwards caller-supplied SQL to the blocks database query path without calling model.CheckReadonly or CheckReadonlyStatementInBox. As a result, when a workspace runs in read-only mode (--readonly=true), an authenticated administrator can submit arbitrary SQL through /api/search/fullTextSearchBlock and obtain raw read access to the blocks database, even though the dedicated /api/query/sql endpoint is blocked in that mode. Fixed in v3.8.2.","dates":{"published":"2026-09-09T11:20:57.576Z","modified":"2026-09-09T14:05:19.500Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.7,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.7,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.7,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":4.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00444,"percentile":0.37547,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.12000000000000005,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00324},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00444,"percentile":0.37547}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00324,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00444,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00444,"percentile":0.37547}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-693","name":"Protection Mechanism Failure","description":"The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.","type":"weakness","status":"Draft","abstraction":"Pillar","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/693.html"}],"affected":[{"vendor":"siyuan-note","product":"siyuan","name":"siyuan","label":"siyuan","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.8.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.8.2","eol":null,"hubHref":"/vendor/siyuan-note/siyuan"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4qwm-3p58-vh67","label":"github.com/siyuan-note/siyuan/security/advisories/GHSA-4qwm-3p58-vh67","hostname":"github.com","tags":["Vendor Advisory"]},{"url":"https://github.com/siyuan-note/siyuan/commit/d5e2d0bce0dffef5f61bd8066954bc2d41181fc5","label":"github.com/siyuan-note/siyuan/commit/d5e2d0bce0dffef5f61bd8066954bc2d41181fc5","hostname":"github.com","tags":["Patch"]},{"url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.2-read-only-boundary-bypass-via-fulltextsearchblock","label":"www.vulncheck.com/advisories/siyuan-before-3.8.2-read-only-boundary-bypass-via-fulltextsearchblock","hostname":"www.vulncheck.com","tags":["Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-09T11:20:57.576Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-09T14:05:19.500Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":35,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T07:54:05.278Z","stale":false,"partial":false}}