What is CVE-2026-40262?

CVE-2026-40262 is a high-severity vulnerability in Enchant97 Note-mark, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-04-16.

How severe is CVE-2026-40262?

High severity. CVSS v3 base score is 8.7 out of 10.

XSS in Enchant97 Note-mark

CVE-2026-40262

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…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (1.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.

Affected products

Enchant97 Note-mark — versions < 0.19.2

Weakness classification (CWE)

References

https://github.com/enchant97/note-mark/security/advisories/GHSA-9pr4-rf97-79qh (x_refsource_CONFIRM)
https://github.com/enchant97/note-mark/commit/6bb62842ccb956870b9bf183629eba95e326e5e3 (x_refsource_MISC)
https://github.com/enchant97/note-mark/releases/tag/v0.19.2 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-40262?: CVE-2026-40262 is a high-severity vulnerability in Enchant97 Note-mark, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-04-16.
How severe is CVE-2026-40262?: High severity. CVSS v3 base score is 8.7 out of 10.