What is CVE-2026-33976?

CVE-2026-33976 is a critical-severity vulnerability in Streetwriters Notesnook_desktop, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-03-27.

How severe is CVE-2026-33976?

Critical severity. CVSS v3 base score is 9.6 out of 10.

RCE in Streetwriters Notesnook_desktop

CVE-2026-33976

Notesnook is a note-taking app. Prior to version 3.3.11 on Web/Desktop and 3.3.17 on Android/iOS, a stored XSS in the Web Clipper rendering flow can be escalated to remote code execution in the desktop app. The root cause is that the clipp…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.007 (49.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Streetwriters Notesnook_desktop
Streetwriters Notesnook Ios/android — versions < 3.3.17
Streetwriters Notesnook_mobile
Streetwriters Notesnook Web/desktop — versions < 3.3.11

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33976?: CVE-2026-33976 is a critical-severity vulnerability in Streetwriters Notesnook_desktop, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-03-27.
How severe is CVE-2026-33976?: Critical severity. CVSS v3 base score is 9.6 out of 10.