CVE-2026-39846

{"id": "CVE-2026-39846", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-39846", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-08T15:23:34.478628Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.3}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.3}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "siyuan-note", "product": "siyuan", "versions": [{"status": "affected", "version": "< 3.6.4"}]}]}], "published": "2026-04-07T22:16:23.597", "references": [{"url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-phhp-9rm9-6gr2", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-phhp-9rm9-6gr2", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-94"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "SiYuan is a personal knowledge management system. Prior to 3.6.4, a malicious note synced to another user can trigger remote code execution in the SiYuan Electron desktop client. The root cause is that table caption content is stored without safe escaping and later unescaped into rendered HTML, creating a stored XSS sink. Because the desktop renderer runs with nodeIntegration enabled and contextIsolation disabled, attacker-controlled JavaScript executes with access to Node.js APIs. In practice, an attacker can import a crafted note into a synced workspace, wait for the victim to sync, and achieve code execution when the victim opens the note. This vulnerability is fixed in 3.6.4."}, {"lang": "es", "value": "SiYuan es un sistema de gesti\u00f3n de conocimiento personal. Antes de la versi\u00f3n 3.6.4, una nota maliciosa sincronizada con otro usuario puede desencadenar la ejecuci\u00f3n remota de c\u00f3digo en el cliente de escritorio SiYuan Electron. La causa ra\u00edz es que el contenido de la leyenda de la tabla se almacena sin un escape seguro y luego se desescapa en HTML renderizado, creando un sumidero XSS almacenado. Debido a que el renderizador de escritorio se ejecuta con nodeIntegration habilitado y contextIsolation deshabilitado, el JavaScript controlado por el atacante se ejecuta con acceso a las API de Node.js. En la pr\u00e1ctica, un atacante puede importar una nota manipulada en un espacio de trabajo sincronizado, esperar a que la v\u00edctima sincronice y lograr la ejecuci\u00f3n de c\u00f3digo cuando la v\u00edctima abre la nota. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 3.6.4."}], "lastModified": "2026-07-20T20:10:00.110", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3951F8B9-C26F-4A2E-98FB-F744EB1F67B8", "versionEndExcluding": "3.6.4"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}