{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-86016","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-04T19:23:40.691Z","datePublished":"2026-10-13T19:15:21.682Z","dateUpdated":"2026-10-29T14:44:07.158Z"},"containers":{"cna":{"title":"VNote: Stored XSS via YAML Frontmatter Leading to Local File Read and Remote Exfiltration","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/vnotex/vnote/security/advisories/GHSA-vfhj-c636-h59x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/vnotex/vnote/security/advisories/GHSA-vfhj-c636-h59x"},{"name":"https://github.com/vnotex/vnote/commit/7371efde531312eb24beb982fb5fdd73469cb171","tags":["x_refsource_MISC"],"url":"https://github.com/vnotex/vnote/commit/7371efde531312eb24beb982fb5fdd73469cb171"},{"name":"https://github.com/vnotex/vnote/releases/tag/v4.3.0","tags":["x_refsource_MISC"],"url":"https://github.com/vnotex/vnote/releases/tag/v4.3.0"}],"affected":[{"vendor":"vnotex","product":"vnote","versions":[{"version":"< 4.3.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-13T19:15:21.682Z"},"descriptions":[{"lang":"en","value":"VNote is a note-taking platform. Prior to 4.3.0, VNote uses the assignment `preNode.innerHTML = p_metaData` in src/data/extra/web/js/markdownit.js to insert YAML frontmatter metadata into a pre element before the protectFromXss sanitization path runs. Opening an attacker-supplied Markdown note can therefore execute stored JavaScript in the file:// viewer context. Because QWebEngineSettings::LocalContentCanAccessRemoteUrls enables local content to access remote URLs, the script can read reachable local note files and transmit their contents to a remote server without further interaction after the note is opened. This issue is fixed in version 4.3.0."}],"source":{"advisory":"GHSA-vfhj-c636-h59x","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/vnotex/vnote/security/advisories/GHSA-vfhj-c636-h59x","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T14:44:00.818443Z","id":"CVE-2026-86016","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-29T14:44:07.158Z"}}]}}