CVE-2026-33588: Arbitrary File Write Through Path Traversal

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-07 · updated 2026-06-17
Weakness: CWE-20

Description

Lack of user input validation in the file upload functionality of Open Notebook v1.8.3 allows the application user to create or modify files on the docker container via path traversal.

Affected products

Open Notebook: before 1.8.4 — fixed in 1.8.4

How to fix

Upgrade to a fixed version: Open Notebook 1.8.4. Check the vendor advisory for mitigations.

References

https://github.com/lfnovo/open-notebook/security/advisories/GHSA-x4q2-89g5-594v

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