# nbconvert has an uncontrolled search path that leads to unauthorized code execution on Windows

Advisory record · `GHSA-xm59-rqc7-hhvf`

- **Identifiers:** `GHSA-xm59-rqc7-hhvf` · `CVE-2025-53000` · `PYSEC-2026-1691`
- **State:** Confirmed
- **Severity:** CVSS 8.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-427](https://cwe.mitre.org/data/definitions/427.html)
- **Tags:** [CWE-427](https://agentprime.io/advisories/tag/cwe-427.md)
- **Published:** 18 Dec 2025
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 18 Dec 2025, 22:03 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `nbconvert` (PyPI): affected `<7.17.0`; fixed in `7.17.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Versions of nbconvert before 7.17.0 on Windows are affected. When a notebook with SVG output is converted to PDF from a directory containing a malicious inkscape.bat file, nbconvert runs that file because it searches the current directory for inkscape. An attacker who can place such a file in the directory where a user runs the conversion can execute arbitrary code. Upgrade to nbconvert 7.17.0 or later.

Written 5 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 8.5 High, CVSS 4.0: `CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0026, the 17th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:34 UTC: First seen by agentprime
- 31 Oct 2026, 14:34 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-xm59-rqc7-hhvf)

## Sources

- [GitHub Advisory Database: GHSA-xm59-rqc7-hhvf](https://github.com/advisories/GHSA-xm59-rqc7-hhvf)
- [OSV: GHSA-xm59-rqc7-hhvf](https://osv.dev/vulnerability/GHSA-xm59-rqc7-hhvf)
- <https://github.com/jupyter/nbconvert/security/advisories/GHSA-xm59-rqc7-hhvf>
- <https://nvd.nist.gov/vuln/detail/CVE-2025-53000>
- <https://github.com/jupyter/nbconvert/issues/2258>
- <https://github.com/jupyter/nbconvert/commit/c9ac1d1040459ed1ff9eb34e9918ce5a87cf9d71>
- <https://github.com/jupyter/nbconvert>
- <https://github.com/jupyter/nbconvert/blob/4f61702f5c7524d8a3c4ac0d5fc33a6ac2fa36a7/nbconvert/preprocessors/svg2pdf.py#L104>
- <https://github.com/jupyter/nbconvert/releases/tag/v7.17.0>
- <https://www.imperva.com/blog/code-execution-in-jupyter-notebook-exports>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-xm59-rqc7-hhvf>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-xm59-rqc7-hhvf/>. Everything for agents: <https://agentprime.io/llms.txt>.