# CVE-2026-7810: UsamaK98 python-notebook-mcp server.py add_cell path traversal

> Remote attackers can exploit path traversal in the python-notebook-mcp server to read or modify arbitrary files on the host system.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 May 2026
- **Updated:** 6 May 2026
- **Also known as:** GHSA-m4mw-6cr3-7cc7

## What is CVE-2026-7810?

CVE-2026-7810 is a medium-severity path traversal vulnerability in UsamaK98 python-notebook-mcp, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw has been found in UsamaK98 python-notebook-mcp up to a05a232815809a7e425b5fa7be26e0d4369894c2. Impacted is the function create_notebook/read_notebook/edit_cell/add_cell of the file server.py. This manipulation causes path traversal. It is possible to initiate the attack remotely. The exploit has been published and may be used. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-7810?


## How do I fix CVE-2026-7810?

No fix has been published for CVE-2026-7810 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-7810 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7810 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7810 and fix it if it is affected.

What it is: CVE-2026-7810 is a medium-severity path traversal vulnerability in UsamaK98 python-notebook-mcp, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7810 exists.

Affected product: UsamaK98 python-notebook-mcp. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-7810/ (Markdown: https://insights.sbomify.com/CVE-2026-7810/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7810
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7810
- OSV: https://osv.dev/vulnerability/CVE-2026-7810

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-7810/
Summaries are generated and may contain mistakes; the official description above is the record.