Affected: Homebrew: aider
**Target:** gitpython-developers/GitPython **Tested:** HEAD `07e80555` (2026-07-25), latest release 3.1.55, `git version 2.50.1` **Reported instances:** 2 exploitable, from a sweep of 14 unguarded call sites
## Summary
GitPython blocks dangerous git options through `Git.check_unsafe_options()`, gated per method by an `allow_unsafe_options` parameter. That guard is applied **per call site**, so any API that forwards `**kwargs` into a git command without calling it passes caller-controlled options straight to git.
A mechanical sweep of every method that forwards `**kwargs` into a `.git.<command>(...)` call found **14 sites with no guard**. Two reach a git option that takes a filesystem path:
| # | Call site | git option | Impact | |---|---|---|---| | 1 | `IndexFile.checkout()` → `git checkout-index` | `--prefix=<path>` | arbitrary file **overwrite** with repository-controlled content | | 2 | `TagReference.create()` → `git tag` | `-F <file>` / `--file=<file>` | arbitrary file **read**, returned in-band |
This is the same defect class already fixed in `Commit.count()` (GHSA-p538-c434-8v24), `Repo.archive()` and `Git.ls_remote()` (GHSA-956x-8gvw-wg5v). Both instances below are still present at HEAD.
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## Instance 1 — `IndexFile.checkout()`: arbitrary file overwrite
`git/index/base.py:1210` accepts `**kwargs` and forwards them with no guard:
```python def checkout(self, paths=None, force=False, fprogress=lambda *args: None, **kwargs): ... proc = self.repo.git.ch…
GitPython before 3.1.57 fails to guard git option forwarding in IndexFile.checkout() and TagReference.create(), allowing attackers to pass unsafe options via kwargs. Attackers can use --prefix to overwrite arbitrary files with repository content or -F to read arbitrary files returned in-band.
GitPython before 3.1.57 fails to guard git option forwarding in IndexFile.checkout() and TagReference.create(), allowing attackers to pass unsafe options via kwargs. Attackers can use --prefix to overwrite arbitrary files with repository content or -F to read arbitrary files returned in-band.
Affected: openEuler:24.03-LTS-SP1: python-GitPython
GitPython is a python library used to interact with git repositories, high-level like git-porcelain, or low-level like git-plumbing. Security Fix(es):
GitPython before 3.1.57 contains an incomplete denylist in the unsafe_git_archive_options guard that omits --add-file and --add-virtual-file options. Attackers can supply these options to Repo.archive() to read arbitrary files from the filesystem and include them in the returned archive.(CVE-2026-73619)
GitPython before 3.1.57 fails to guard git option forwarding in IndexFile.checkout() and TagReference.create(), allowing attackers to pass unsafe options via kwargs. Attackers can use --prefix to overwrite arbitrary files with repository content or -F to read arbitrary files returned in-band.(CVE-2026-73620)
GitPython before 3.1.56 contains an argument injection vulnerability in the Commit.count() method, which forwards keyword arguments to 'git rev-list' without the check_unsafe_options guard present in the sibling iter_items method. An attacker who can control options passed to Commit.count (e.g., via an application that forwards a user-supplied options dict) can supply output=<path>, causing 'git rev-list --output=<path>' to open and truncate the target file to zero bytes before revision parsing. This allows destruction/blanking of an arbitrary file at the process's privilege level (no content control, 0-byte truncation).(CVE-2026-73621)
GitPython before 3.1.55 fails to disable env…
python313-GitPython-3.1.59-2.1 on GA media
Affected: PyPI: gitpython
GitPython before 3.1.57 fails to guard git option forwarding in IndexFile.checkout() and TagReference.create(), allowing attackers to pass unsafe options via kwargs. Attackers can use --prefix to overwrite arbitrary files with repository content or -F to read arbitrary files returned in-band.
django: Django: Remote code execution via GeoDjango spatial lookups aiohttp: AIOHTTP: Arbitrary code execution via untrusted input to CookieJar.load() JWCrypto: python-cryptography: python: JWCrypto: Memory exhaustion via crafted compressed JWE tokens tmp: path Traversal via unsanitized prefix/postfix enables directory escape awxkit: path traversal via YAML !include directive pyasn1: pyasn1: Denial of Service via crafted ASN.1 REAL values gitpython: GitPython: Environment variable exfiltration via attacker-controlled clone URL gitpython: GitPython: Arbitrary code execution via command injection due to unguarded Git options gitpython: GitPython: Arbitrary Code Execution via Joined Short Options Bypass gitpython: GitPython: Command Injection via Git option prefix abbreviation aiohttp: AIOHTTP: HTTP Request Smuggling via WebSocket Upgrade aiohttp: AIOHTTP: Denial of Service via malformed HTTP responses awx: project archive extraction allows path traversal file writes awx: webhook status callback SSRF leaks the Git PAT awx: notification backends allow SSRF and credential leakage gitpython: GitPython: Arbitrary file overwrite and read via unsafe git option forwarding GitPython: GitPython: Arbitrary file read via TagReference.create()
Affected: Ubuntu:Pro:14.04:LTS: python-git, Ubuntu:Pro:16.04:LTS: python-git, Ubuntu:Pro:18.04:LTS: python-git, Ubuntu:Pro:20.04:LTS: python-git, Ubuntu:Pro:22.04:LTS: python-git, Ubuntu:Pro:24.04:LTS: python-git, Ubuntu:Pro:26.04:LTS: python-git
GitPython before 3.1.57 fails to guard git option forwarding in IndexFile.checkout() and TagReference.create(), allowing attackers to pass unsafe options via kwargs. Attackers can use --prefix to overwrite arbitrary files with repository content or -F to read arbitrary files returned in-band.