{"id":"CVE-2026-40262","revision":"3cf92efa5dda469fbf194d7f08c9a666","records":[{"revision":"3cf92efa5dda469fbf194d7f08c9a666","observedAt":"2026-10-27T10:09:56.341+00:00","statement":{"source":"nvd","id":"CVE-2026-40262","aliases":[],"title":"Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the asset delivery handler serves uploaded files inline and relies on magic-byte detection for content type, which does not identify text-based formats such …","description":"Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the asset delivery handler serves uploaded files inline and relies on magic-byte detection for content type, which does not identify text-based formats such as HTML, SVG, or XHTML. These files are served with an empty Content-Type, no X-Content-Type-Options: nosniff header, and inline disposition, allowing browsers to sniff and render active content. An authenticated user can upload an HTML or SVG file containing JavaScript as a note asset, and when a victim navigates to the asset URL, the script executes under the application's origin with access to the victim's authenticated session and API actions. This issue has been fixed in version 0.19.2.","state":0,"publishedAt":"2026-04-17T01:17:39.95+00:00","modifiedAt":"2026-10-26T21:10:00.17+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","score":8.7,"severity":"HIGH"}],"references":["https://github.com/enchant97/note-mark/commit/6bb62842ccb956870b9bf183629eba95e326e5e3","https://github.com/enchant97/note-mark/releases/tag/v0.19.2","https://github.com/enchant97/note-mark/security/advisories/GHSA-9pr4-rf97-79qh"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-40262","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-79","CWE-434"],"productCriteria":[],"sourceDates":{"published":"2026-04-17T01:17:39.950","lastModified":"2026-10-26T21:10:00.170"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-40262","identifiers":["CVE-2026-40262"]},"retained":false,"historicalAffected":[]}],"coverage":[]}