CVE-2026-31876

{"id": "CVE-2026-31876", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.3}]}, "published": "2026-03-11T19:16:04.140", "references": [{"url": "https://github.com/streetwriters/notesnook/commit/e87f5e5f899f45df28d7c0f33f15e9178d1fbcb7", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/streetwriters/notesnook/security/advisories/GHSA-jprx-2w2h-4rh5", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "Notesnook is a note-taking app focused on user privacy & ease of use. Prior to 3.3.9, a Stored Cross-Site Scripting (XSS) vulnerability existed in Notesnook's editor embed component when rendering Twitter/X embed URLs. The tweetToEmbed() function in component.tsx interpolated the user-supplied URL directly into an HTML string without escaping, which was then assigned to the srcdoc attribute of an <iframe>. This vulnerability is fixed in 3.3.9."}, {"lang": "es", "value": "Notesnook es una aplicaci\u00f3n para tomar notas centrada en la privacidad del usuario y la facilidad de uso. Previo a la 3.3.9, exist\u00eda una vulnerabilidad de cross-site scripting (XSS) almacenado en el componente de incrustaci\u00f3n del editor de Notesnook al renderizar URLs de incrustaci\u00f3n de Twitter/X. La funci\u00f3n tweetToEmbed() en component.tsx interpolaba la URL proporcionada por el usuario directamente en una cadena HTML sin escapar, la cual se asignaba luego al atributo srcdoc de un . Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 3.3.9."}], "lastModified": "2026-03-17T15:59:17.190", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:streetwriters:notesnook_desktop:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8756DA11-54F2-4580-80D6-B66BDD875599", "versionEndExcluding": "3.3.9"}, {"criteria": "cpe:2.3:a:streetwriters:notesnook_mobile:*:*:*:*:*:android:*:*", "vulnerable": true, "matchCriteriaId": "D6F019A8-553F-4070-8235-F57DC7A489F4", "versionEndExcluding": "3.3.15"}, {"criteria": "cpe:2.3:a:streetwriters:notesnook_mobile:*:*:*:*:*:iphone_os:*:*", "vulnerable": true, "matchCriteriaId": "5EFF2675-83AD-4E81-9DDC-A1706C799A00", "versionEndExcluding": "3.3.15"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}