CVE-2026-40262

HIGH EPSS 22.6%
Published Apr 17, 20262mo ago · Modified Jun 17, 20262w ago
8.7 CVSS 3.1
High
Find Similar
Published Apr 17, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.7
Exploitability
2.3
Impact
5.8
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
22.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-434 Unrestricted Upload of File with Dangerous Type Resource Mgmt
CWE-79 Cross-site Scripting Injection

References 3

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.