CVE-2026-55570

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{"affected": [{"affectedData": [{"product": "siyuan", "vendor": "siyuan-note", "versions": [{"status": "affected", "version": "< 3.7.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, it does not escape the untrusted fields (name, version, author, description) when they are serialized into the data-obj HTML attribute of each marketplace card. Because the attribute is single-quoted and the value is produced with JSON.stringify() (which does not escape ', <, or >), a package whose name contains a single quote breaks out of the attribute and injects arbitrary HTML. In the desktop client the main BrowserWindow runs with nodeIntegration: true, contextIsolation: false, so the injected markup escalates from DOM XSS to arbitrary OS command execution. This is the same root cause and same impact as the original advisory, reached through a sibling sink the patch did not cover. This vulnerability is fixed in 3.7.0."}, {"lang": "es", "value": "SiYuan es un sistema de gesti\u00f3n de conocimiento personal de c\u00f3digo abierto. Antes de la versi\u00f3n 3.7.0, no escapa los campos no confiables (nombre, versi\u00f3n, autor, descripci\u00f3n) cuando se serializan en el atributo HTML data-obj de cada tarjeta del marketplace. Debido a que el atributo est\u00e1 entre comillas simples y el valor se produce con JSON.stringify() (que no escapa \u2019, <, o >), un paquete cuyo nombre contiene una comilla simple se sale del atributo e inyecta HTML arbitrario. En el cliente de escritorio, la BrowserWindow principal se ejecuta con nodeIntegration: true, contextIsolation: false, por lo que el marcado inyectado escala de XSS DOM a la ejecuci\u00f3n arbitraria de comandos del sistema operativo. Esta es la misma causa ra\u00edz y el mismo impacto que el aviso original, alcanzado a trav\u00e9s de un \u2019sink\u2019 hermano que el parche no cubri\u00f3. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 3.7.0."}], "id": "CVE-2026-55570", "lastModified": "2026-10-25T23:10:00.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55570", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-25T13:49:21.857553Z", "version": "2.0.3"}}]}, "published": "2026-06-24T22:16:49.260", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-x88j-wgpr-h22x"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-x88j-wgpr-h22x"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-116"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.7.0)"}}], "enrichment": {"confidence": 84.0, "confidence_source": "matching", "scores": [{"score": 84.0, "source": "matching"}]}, "original": {"product": "siyuan", "source": "cna", "vendor": "siyuan-note"}, "product": "siyuan", "vendor": "siyuan"}], "created": "2026-06-24T22:30:15.384061+00:00", "updated": "2026-06-25T13:15:03.616557+00:00", "vendors": ["siyuan", "siyuan$PRODUCT$siyuan"]}