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CVE-2026-31876

nvd nist
Published: Mar 11, 2026Modified: Jun 17, 2026

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5.4
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Exploitability: 2.3 / Impact: 2.7
Source: security-advisories@github.com (Secondary)

Description

Notesnook is a note-taking app focused on user privacy & ease of use. Prior to 3.3.9, a Stored Cross-Site Scripting (XSS) vulnerability existed in Notesnook's editor embed component when rendering Twitter/X embed URLs. The tweetToEmbed() function in component.tsx interpolated the user-supplied URL directly into an HTML string without escaping, which was then assigned to the srcdoc attribute of an <iframe>. This vulnerability is fixed in 3.3.9.

Affected (3)

Streetwriters
2 products
Notesnook Desktop
Notesnook Mobile
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Notesnook Desktop
Before 3.3.9
Streetwriters
Notesnook Mobile
Before 3.3.15
Notesnook Mobile
Before 3.3.15

Related CWEs

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (2)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Vendor Advisory

Timeline

No history available yet.