CVE-2026-40262: high-severity vulnerability in enchant97 note-mark
Note Mark has Stored XSS via Unrestricted Asset Upload
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Affected products
enchant97 · note-markRelated CVEs — enchant97 note-mark
In the same product, most dangerous first.
CVE-2024-41819HIGHNote Mark has a stored XSS in the note link href attributeEPSS 0.8%CVE-2026-44522HIGHNote Mark: Arbitrary File Write via Path Traversal in Asset Names Leading to Remote Code ExecutionEPSS 0.6%CVE-2026-50553HIGHNote Mark: Path traversal via unsanitized book/note slug in migrate export (sibling of GHSA-g49p)EPSS 0.5%CVE-2026-40265MEDIUMNote Mark has Broken Access Control on Asset DownloadEPSS 0.4%CVE-2026-50554MEDIUMNote Mark: Unauthenticated disclosure of soft-deleted note metadata via deleted=true on public books in note-markEPSS 0.4%CVE-2026-41571CRITICALNote Mark: OIDC-registered users authenticated by submitting password "null"EPSS 0.4%