High 8.7Published Apr 16, 2026

CVE-2026-40262Note Mark has Stored XSS via Unrestricted Asset Upload

Updated under an hour ago (Oct 26, 2026, 2:50 AM ET)

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It affects enchant97 note-mark. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for enchant97 note-mark

Exploited in the last 30 days

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: 8.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness (CWE): CWE-79, CWE-434
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Apr 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

enchant97 note-mark enchant97:note_mark (from the name)	before 0.19.2	CNA record

References

https://github.com/enchant97/note-mark/security/advisories/GHSA-9pr4-rf97-79qhx-refsource-confirm
https://github.com/enchant97/note-mark/commit/6bb62842ccb956870b9bf183629eba95e326e5e3x-refsource-misc
https://github.com/enchant97/note-mark/releases/tag/v0.19.2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.