# GitPython submodule update path traversal can write outside the repository

Advisory record · `GHSA-59cr-6r3x-644w`

- **Identifiers:** `GHSA-59cr-6r3x-644w` · `CVE-2026-100689`
- **State:** Confirmed
- **Severity:** CVSS 8.7 High
- **Critical:** No
- **Weakness (CWE):** [CWE-22](https://cwe.mitre.org/data/definitions/22.html) · [CWE-73](https://cwe.mitre.org/data/definitions/73.html)
- **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md)
- **Published:** 30 Sept 2026
- **Updated:** 1 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 30 Sept 2026, 23:47 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `gitpython` (PyPI): affected `<3.1.62`; fixed in `3.1.62`

## Machine-written summary

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

> GitPython before 3.1.62 lets a crafted .gitmodules path value make submodule updates create, populate, or delete directories outside the repository. The attack needs the victim's code to update submodules at a non-HEAD commit, and no end-to-end trigger was built. Upgrade to GitPython 3.1.62.

Written 1 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0040, the 34th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:09 UTC: First seen by agentprime
- 31 Oct 2026, 14:09 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-59cr-6r3x-644w)

## Sources

- [GitHub Advisory Database: GHSA-59cr-6r3x-644w](https://github.com/advisories/GHSA-59cr-6r3x-644w)
- [OSV: GHSA-59cr-6r3x-644w](https://osv.dev/vulnerability/GHSA-59cr-6r3x-644w)
- <https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-59cr-6r3x-644w>
- <https://github.com/gitpython-developers/GitPython/pull/2225>
- <https://github.com/gitpython-developers/GitPython/commit/1ed0ebc2f2e74d979cdc367a4864a7731fdcc093>
- <https://github.com/gitpython-developers/GitPython>
- <https://github.com/gitpython-developers/GitPython/releases/tag/3.1.62>

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-59cr-6r3x-644w>, 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-59cr-6r3x-644w/>. Everything for agents: <https://agentprime.io/llms.txt>.