Affected: Homebrew: aider
## Summary GitPython's `unsafe_git_clone_options` denylist omits `--template`. `git clone --template=<dir>` copies `<dir>/hooks/` into the new repository and runs them (`post-checkout` fires during clone), so a caller who can influence clone options can achieve arbitrary command execution in the default `allow_unsafe_options=False` configuration.
## Root Cause `base.py:145-152` defines `unsafe_git_clone_options = ["--upload-pack","-u","--config","-c"]` — `--template` is absent. The guard candidate `['--template']` passes `check_unsafe_options` (verified). git copies the hook directory and executes `post-checkout` at checkout time. git's `protocol.allow`/`GIT_ALLOW_PROTOCOL` do not gate `--template`; the incomplete denylist is the only defense.
## Impact Arbitrary OS command execution during clone (default config). Requires an attacker-readable directory containing an executable hook — a genuine second precondition (realistic via shared filesystems, upload dirs, `/tmp`, or attacker-writable network paths), reflected as AC:H.
## Proof of Concept ```python # attacker stages <dir>/hooks/post-checkout (chmod +x) from git import Repo Repo.clone_from(src, dst, template='<dir>') # post-checkout hook executes -> marker created (verified) ```
## Attack Chain 1. Setup: attacker stages `<dir>/hooks/post-checkout` (chmod +x). Guard: n/a (filesystem). 2. Entry: `Repo.clone_from(url, path, template='<dir>')`. Guard: `check_unsafe_options(candidates=['--template'], unsafe=unsafe_git_c…
GitPython before 3.1.54 contains an incomplete denylist in unsafe_git_clone_options that omits --template, allowing attackers to achieve arbitrary command execution during clone operations. Attackers can supply --template pointing to a directory containing malicious post-checkout hooks that execute when git clones the repository.
GitPython before 3.1.54 contains an incomplete denylist in unsafe_git_clone_options that omits --template, allowing attackers to achieve arbitrary command execution during clone operations. Attackers can supply --template pointing to a directory containing malicious post-checkout hooks that execute when git clones the repository.
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 3.1.54 contains an incomplete denylist in unsafe_git_clone_options that omits --template, allowing attackers to achieve arbitrary command execution during clone operations. Attackers can supply --template pointing to a directory containing malicious post-checkout hooks that execute when git clones the repository.
jetty: Eclipse Jetty: Information disclosure due to retained HTTP/1.1 trailers across connections ansible-core: argument injection in ansible-galaxy role install leads to arbitrary code execution ansible-core: argument injection in ansible-galaxy collection install via git clone (incomplete fix for CVE-2026-11332) aiohttp: AIOHTTP: Arbitrary code execution via untrusted input to CookieJar.load() GitPython: GitPython: Arbitrary command execution due to bypass of dangerous Git option checks GitPython: GitPython: Arbitrary code execution via improper validation of clone options GitPython: GitPython: Arbitrary code execution via injected newlines in Git configuration ruby-jwt: ruby-jwt: Authentication bypass due to empty key in HMAC verification jackson-databind: jackson-databind: Arbitrary code execution via PolymorphicTypeValidator bypass com.fasterxml.jackson.core/jackson-core: tools.jackson.core/jackson-core: jackson-core: Denial of Service via incomplete fix in async JSON parser aiohttp: AIOHTTP: HTTP Request Smuggling via WebSocket Upgrade aiohttp: AIOHTTP: Denial of Service via malformed HTTP responses gitpython: GitPython: Arbitrary file overwrite and read via unsafe git option forwarding gitpython: GitPython: Information disclosure via environment variable expansion in URL handling gitpython: GitPython: Remote Code Execution via malicious Git template gitpython: GitPython: Arbitrary File Overwrite via improper git option validation gitpython: GitPython: Remote Code Exec…
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 3.1.54 contains an incomplete denylist in unsafe_git_clone_options that omits --template, allowing attackers to achieve arbitrary command execution during clone operations. Attackers can supply --template pointing to a directory containing malicious post-checkout hooks that execute when git clones the repository.