CVE-2026-33587

Remote Code Execution (RCE) via Server-Side Template Injection (SSTI)

State: Published
Severity: 9.2 Critical
Published: May 7, 2026
Updated: May 7, 2026
Reserved: Mar 23, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	9.2 Critical	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N	ENISA

Weaknesses

CWE-20 Improper input validation

Affected Products

Product	Versions
Open NotebookOpen Notebook	1.8.3 and earlierAffected

References

https://github.com/lfnovo/open-notebook/security/advisories/GHSA-f35w-wx37-26q7vendor-advisory

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