What is CVE-2026-33976?

CVE-2026-33976 is a critical-severity vulnerability in Streetwriters Notesnook Ios/android, classified under Cross-site Scripting. CVSS score: 9.7/10. Published 2026-03-27.

How severe is CVE-2026-33976?

Critical severity. CVSS v3 base score is 9.7 out of 10.

RCE in Streetwriters Notesnook Ios/android

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: 0.001 (22.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.7 (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 Ios/android — versions < 3.3.17
Streetwriters Notesnook Web/desktop — versions < 3.3.11

Weakness classification (CWE)

References

https://github.com/streetwriters/notesnook/security/advisories/GHSA-f42f-phvp-43x5 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-33976?: CVE-2026-33976 is a critical-severity vulnerability in Streetwriters Notesnook Ios/android, classified under Cross-site Scripting. CVSS score: 9.7/10. Published 2026-03-27.
How severe is CVE-2026-33976?: Critical severity. CVSS v3 base score is 9.7 out of 10.