{"id":"CVE-2026-86016","state":"PUBLISHED","title":"VNote: Stored XSS via YAML Frontmatter Leading to Local File Read and Remote Exfiltration","description":"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.","publishedAt":"2026-10-13T19:15:21.682Z","updatedAt":"2026-10-29T14:44:07.158Z","severity":{"score":8.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["vnotex vnote"],"affected":[{"vendor":"vnotex","product":"vnote","versions":[{"version":"< 4.3.0","status":"affected"}]}],"references":["https://github.com/vnotex/vnote/security/advisories/GHSA-vfhj-c636-h59x","https://github.com/vnotex/vnote/commit/7371efde531312eb24beb982fb5fdd73469cb171","https://github.com/vnotex/vnote/releases/tag/v4.3.0"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/86xxx/CVE-2026-86016.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-86016","state":"PUBLISHED","datePublished":"2026-10-13T19:15:21.682Z","dateUpdated":"2026-10-29T14:44:07.158Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-04T19:23:40.691Z"},"containers":{"cna":{"title":"VNote: Stored XSS via YAML Frontmatter Leading to Local File Read and Remote Exfiltration","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."}],"affected":[{"vendor":"vnotex","product":"vnote","versions":[{"version":"< 4.3.0","status":"affected"}]}],"references":[{"url":"https://github.com/vnotex/vnote/security/advisories/GHSA-vfhj-c636-h59x","name":"https://github.com/vnotex/vnote/security/advisories/GHSA-vfhj-c636-h59x","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/vnotex/vnote/commit/7371efde531312eb24beb982fb5fdd73469cb171","name":"https://github.com/vnotex/vnote/commit/7371efde531312eb24beb982fb5fdd73469cb171","tags":["x_refsource_MISC"]},{"url":"https://github.com/vnotex/vnote/releases/tag/v4.3.0","name":"https://github.com/vnotex/vnote/releases/tag/v4.3.0","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-13T19:15:21.682Z"},"source":{"advisory":"GHSA-vfhj-c636-h59x","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-29T14:44:07.158Z"}}]}}}