CVE-2026-33587: Lfnovo Open-Notebook

Critical severity, CVSS 10.0. EPSS: 0.4% chance of exploitation in the next 30 days.

Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and subsequently OS commands) on the docker container via Server-Side Template Injection (SSTI) for user-created transformations.

Affected products

• Lfnovo Open-Notebook: before 1.8.4 (fixed in 1.8.4)

Published 2026-05-07. Last modified 2026-06-17.