CVE-2026-33587

Critical

Description

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.

SeverityCritical

CVSS10.0

Exploit probability—

ProductLfnovo Open-notebook

PublishedMay 7, 2026

First seenMay 7, 2026

Weakness typeCWE-20Improper input validation

How to fix

Update

lfnovo open-notebook1.8.4 or later

Vendor advisories

github.com/lfnovo/open-notebook/security/advisories/GHSA-f35w-wx37-26q7

Affected products

Product	Affected versions	Fixed in
lfnovo open-notebook	v < 1.8.4	1.8.4

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