CVE-2026-31876

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/streetwriters/notesnook/commit/e87f5e5f899f45df28d7c0f33f15e9178d1fbcb7	Patch
https://github.com/streetwriters/notesnook/security/advisories/GHSA-jprx-2w2h-4rh5	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:streetwriters:notesnook_desktop::::::::
	cpe:2.3:a:streetwriters:notesnook_mobile::::::android::*
	cpe:2.3:a:streetwriters:notesnook_mobile::::::iphone_os::*

History

No history.

Information

Published : 2026-03-11 19:16

Updated : 2026-06-17 10:34

NVD link : CVE-2026-31876

Mitre link : CVE-2026-31876

CVE.ORG link : CVE-2026-31876

JSON object : View

Products Affected

streetwriters

notesnook_desktop
notesnook_mobile

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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