CVE-2026-31876 — MEDIUM (5.4)

Q: How severe is CVE-2026-31876?

CVE-2026-31876 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-31876?

Check the references section above for vendor advisories and patch information. Affected products include: Streetwriters Notesnook Desktop, Streetwriters Notesnook Mobile.

Vulnerability 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.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Streetwriters	Notesnook Desktop	< 3.3.9
Streetwriters	Notesnook Mobile	< 3.3.15

Related Weaknesses (CWE)

CWE-79

References

FAQ

What is CVE-2026-31876?

CVE-2026-31876 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 Twi...

How severe is CVE-2026-31876?

CVE-2026-31876 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-31876?

Check the references section above for vendor advisories and patch information. Affected products include: Streetwriters Notesnook Desktop, Streetwriters Notesnook Mobile.