# CVE-2026-67326: GitPython newline injection in config_writer() section parameter

Source: https://junglewise.ai/threats/cve-2026-67326-gitpython-newline-injection-in-config-writer-section-parameter  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-01. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-67326 · Severity: high · CVSS 7 · Published 2026-08-01

GitPython is a widely-used Python library for interacting with Git repositories. A flaw in the config_writer() function fails to sanitize newline characters in the section parameter, allowing an attacker to inject arbitrary configuration headers into the .git/config file. By crafting a malicious section name, attackers can inject a fake [core] section pointing to attacker-controlled directories for Git hooks, leading to arbitrary code execution when users run standard Git operations like commits.

Technologies: [Gitpython Project Gitpython](https://junglewise.ai/threats/technologies/gitpython), [gitpython (PyPI)](https://junglewise.ai/threats/technologies/pypi-gitpython). Vendors: [Gitpython Project](https://junglewise.ai/threats/vendors/gitpython-project), [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-67326 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-67326 being exploited in the wild.

**How severe is CVE-2026-67326?** High severity, with a CVSS score of 7, published 1 August 2026.

**Which products and versions are affected?** gitpython (PyPI) ECOSYSTEM:introduced=0,fixed=3.1.50.

**Is there a fix for CVE-2026-67326?** Yes. gitpython (PyPI): upgrade to 3.1.50 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-67326 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-67326?** Check whether you run Gitpython Project Gitpython or gitpython (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- gitpython (PyPI): upgrade to 3.1.50 or later

  ```sh
  pip install "gitpython>=3.1.50"
  ```


## Technical details

The vulnerability is an improper input validation flaw (CWE-20) in GitPython's config_writer() method, which passes the section parameter directly to configparser without sanitizing newline characters. While a prior patch (CVE-2026-42215) validated the value parameter, the section and option parameters remain unvalidated. An attacker can inject "\n" sequences into the section argument to write multiple section headers into .git/config; for example, section="user]\n[core" results in both [user] and [core] headers being written. By injecting a malicious [core] section with hooksPath pointing to an attacker-controlled directory, code execution is achieved when any Git hook is triggered. The attack requires local filesystem access and user interaction (triggering a Git hook), but does not require elevated privileges. Patches are available in GitPython 3.1.50 and later.

## Affected products

- GitPython GitPython before 3.1.50

## Identifiers

- CVE-2026-67326
- GHSA-mv93-w799-cj2w
- PYSEC-2026-3980

## Timeline

- 2026-05-06: disclosed
- 2026-05-06: patched: GitPython 3.1.50 and later
- 2026-08-01: advisory

## References

- [https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-mv93-w799-cj2w](https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-mv93-w799-cj2w)
- [https://www.vulncheck.com/advisories/gitpython-before-newline-injection-via-config-writer-section](https://www.vulncheck.com/advisories/gitpython-before-newline-injection-via-config-writer-section)

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