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CVE-2026-33587: open-notebook vulnerability
CVE-2026-33587: critical vulnerability affecting open-notebook. Check CVSS, KEV status, business impact and recommended administrator actions.
- CVSS
- 9.2 CRITICAL
- EPSS
- 13.9%
- Known exploited
- not in KEV
- Product
- open-notebook
What is known
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.
Business impact
Successful exploitation of CVE-2026-33587, a critical vulnerability (CVSS 9.2) affecting open-notebook, may affect the confidentiality, integrity or availability of the vulnerable environment. The exact impact depends on the installed version, exposed interfaces and deployment configuration.
Recommended administrator action
Confirm whether open-notebook is present and compare installed versions with the vendor advisory and NVD record. Apply the vendor patch or documented mitigation; until remediation is complete, reduce exposure of affected interfaces, review relevant logs and monitor for indicators of exploitation. DataHouse can support version verification, managed patching, network exposure reduction, log review and backup validation for dedicated, cloud and colocated environments.