{"schemaVersion":3,"id":"CVE-2026-72811","aliases":["GHSA-q2vg-7qgx-x5fc","GO-2026-6402"],"status":"published","duplicateOf":null,"title":null,"description":"SiYuan versions <= v3.7.2 contain a SQL injection vulnerability in the backlink/mention search query (kernel/model/backlink.go), which concatenates stored block metadata (title, name, alias, anchor text) and the client-supplied keyword into a SQL MATCH/search statement while escaping only the double-quote character and not the single quote. A single quote in the client keyword (first-order, reachable by an anonymous or RoleReader user on the publish surface) or in stored document metadata (second-order) breaks out of the string literal. Because the query runs on the main read-write siyuan.db handle via a statement-stacking-capable driver, an attacker can execute arbitrary SQL, enabling cross-notebook read and write. Fixed in v3.7.4.","dates":{"published":"2026-08-14T11:35:24.767Z","modified":"2026-08-14T16:52:14.903Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":10,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":9.9,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":10,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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Neutralization of Special Elements used in an SQL Command ('SQL Injection')","description":"The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/89.html"}],"affected":[{"vendor":"github.com/siyuan-note/siyuan","product":"kernel","name":"github.com/siyuan-note/siyuan/kernel","label":"kernel","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/siyuan-note/siyuan/kernel","purlType":"golang","versions":[{"text":"< 0.0.0-20260723004839-1a5b3431d5ab","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.0.0-20260723004839-1a5b3431d5ab","eol":null,"hubHref":null},{"vendor":"siyuan-note","product":"siyuan","name":"siyuan","label":"siyuan","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.7.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.7.4","eol":null,"hubHref":"/vendor/siyuan-note/siyuan"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-q2vg-7qgx-x5fc","label":"github.com/siyuan-note/siyuan/security/advisories/GHSA-q2vg-7qgx-x5fc","hostname":"github.com","tags":["Vendor Advisory","WEB","Advisory"]},{"url":"https://www.vulncheck.com/advisories/siyuan-before-sql-injection-via-backlink-search","label":"www.vulncheck.com/advisories/siyuan-before-sql-injection-via-backlink-search","hostname":"www.vulncheck.com","tags":["Third Party Advisory","WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72811","label":"nvd.nist.gov/vuln/detail/CVE-2026-72811","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/siyuan-note/siyuan/commit/1a5b3431d5ab3036b19c1cc79486fedd6906fb57","label":"github.com/siyuan-note/siyuan/commit/1a5b3431d5ab3036b19c1cc79486fedd6906fb57","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/siyuan-note/siyuan","label":"github.com/siyuan-note/siyuan","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:21897-1","SUSE-SU-2026:23855-1","SUSE-SU-2026:23863-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:21897-1","SUSE-SU-2026:23855-1","SUSE-SU-2026:23863-1"]},"timeline":[{"kind":"published","date":"2026-08-14T11:35:24.767Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-14T16:52:14.903Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T16:06:54.669Z","stale":false,"partial":false}}