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.
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Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-07. NVD baseline CVSS 10.0; sources differ by 0.0.
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.
May 7, 2026
May 7, 2026
Affected: v1.8.4. The ai-prompter dependency was bumped to 0.4.0 which uses Jinja2
https://github.com/lfnovo/open-notebook/security/advisories/GHSA-f35w-wx37-26q7MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
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CWE-20