{"schema_version":"1","data":[{"id":12999,"advisory_id":"a861dc63-48a9-4c31-a563-d0a8742bc93e","revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-75916","source_published_at":"2026-08-19T14:01:50.37+00:00","published_at":"2026-10-25T00:17:22.902521+00:00","extraction_method":"structured","technologies":["core-cve","siyuan"],"cve_ids":["CVE-2026-75916"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"SiYuan XSS-to-RCE via unescaped block metadata in hint popup","summary":"SiYuan through 3.7.3 contains a cross-site scripting vulnerability in the '((' block-reference autocomplete hint popup. In genHintItemHTML() (app/src/protyle/hint/extend.ts), a candidate block's name, alias, and memo fields are concatenated into the popup's HTML without escaping. An attacker who can set these metadata fields on a block can inject a self-firing payload (e.g. ) that executes automatically when a victim types '((' followed by a search term that surfaces the crafted block. Because SiYuan's Electron windows run with nodeIntegration enabled, contextIsolation disabled, and no CSP, the injected script gains require('child_process') access, allowing the XSS to escalate to arbitrary OS command execution.","evidence":"cve:CVE-2026-75916","products":[{"name":{"value":"siyuan","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"critical","structured":{"id":"CVE-2026-75916","aliases":["CVE-2026-75916"],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","baseScore":9.3,"attackVector":"LOCAL","baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","userInteraction":"PASSIVE","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","subIntegrityImpact":"HIGH","vulnIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","vulnConfidentialityImpact":"HIGH"}},{"format":"CVSS","cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":8.6,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}}],"affected":[{"vendor":"siyuan-note","product":"siyuan","packageURL":"pkg:golang/github.com/siyuan-note/siyuan/kernel","defaultStatus":"affected"}],"modified":"2026-10-08T15:51:43.765Z","provider":"cve","references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-5prr-vgxq-69g9","https://www.vulncheck.com/advisories/siyuan-xss-to-rce-via-unescaped-block-metadata-in-hint-popup"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-75916","role":"CISA Coordinator","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-08-21T19:21:47.693296Z"}}}],"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-5prr-vgxq-69g9","tags":["exploit"]}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-21T19:22:16.263Z"}}],"cna":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-10-08T15:51:43.765Z"}}},"related_cves":[{"value":"CVE-2026-75916","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"}}],"next_after":12999,"next_before":12999}