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).

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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)

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4072-1 advisory.

    - CVE-2026-42215: command injection via Git options bypass (bsc#1264604).
    - CVE-2026-42284: unsafe option check validates multi_options before shlex.split transforms it     (bsc#1264605).
    - CVE-2026-44243: path traversal in GitPython reference APIs allows arbitrary file write and delete     outside the       repository (bsc#1264606).
    - CVE-2026-44244: newline injection in config_writer().set_value() enables RCE via core.hooksPath     (bsc#1264608).
    - CVE-2026-67322: vulnerable to environment-variable exfiltration in Repo.clone_from() (bsc#1273357).
    - CVE-2026-67323: fails to guard against dangerous Git options passed as keyword arguments in     Repo.archive() and       git.ls_remote() (bsc#1273358).
    - CVE-2026-67325: contains an incomplete command injection blocklist that fails to account for git's long-     option prefix       abbreviation feature (bsc#1273359).
    - CVE-2026-67326: fails to validate newline characters in the section parameter of config_writer()     (bsc#1273364).
    - CVE-2026-69097: fails to properly escape section names in git config files, allowing attackers to inject     arbitrary       configuration directives through malicious submodule names (bsc#1273414).
    - CVE-2026-73619: incomplete denylist in the `unsafe_git_archive_options` guard that omits `--add-file`     and `--add-       virtual-file` options can lead to arbitrary file reads (bsc#1275755).
    - CVE-2026-73620: failure to guard git option forwarding in `IndexFile.checkout()` and     `TagReference.create()` can lead       to arbitrary file reads and writes (bsc#1275756).
    - CVE-2026-73621: argument injection in the `Commit.count()` method allows for destruction/blanking of     arbitrary files       (bsc#1275757).
    - CVE-2026-73622: failure to disable environment variable expansion in `Remote.create()` and     `Submodule.add()` URL       handling allows for secret exfiltration via URLs containing variable references (bsc#1275751).
    - CVE-2026-73623: incomplete denylist in `unsafe_git_clone_options` that omits `--template` allows for     arbitrary command       execution (bsc#1275752).
    - CVE-2026-73624: `Diffable.diff` method fails to validate git options passed through `kwargs`, which can     lead to       arbitrary file writes (bsc#1275753).
    - CVE-2026-73625: `check_unsafe_options` guard bypass via smuggling of git options inside single-character     `kwarg`       values can lead to arbitrary code execution (bsc#1275754).
    - CVE-2026-76217: failure to validate options passed to `git rm` and `git checkout` commands in     `IndexFile.remove()` and       `Head.checkout()` can lead to arbitrary file reads (bsc#1275745).
    - CVE-2026-76218: unguarded git option forwarding in `Repo.init` allows for arbitrary command execution     (bsc#1275746).
    - CVE-2026-76219: unguarded `git read-tree` option forwarding in `IndexFile.from_tree/reset/merge_tree`     can lead to       arbitrary file overwrites (bsc#1275747).
    - CVE-2026-76220: `check_unsafe_options` guard can be bypassed by combining a single-character `kwarg`     with       `split_single_char_options=False`, which can lead to arbitrary OS command injection (bsc#1275748).
    - CVE-2026-76221: `config-name` injection in the `option-name` validator can lead to remote code execution       (bsc#1275749).
    - CVE-2026-76222: failure to validate submodule names from `.gitmodules` files allows creation of Git     repositories at       arbitrary filesystem paths outside the intended clone directory (bsc#1275750).
    - CVE-2026-78675: fails to disable merge_includes when parsing .gitmodules, allowing attackers to disclose     local file       content by including arbitrary file paths via [include] directives (bsc#1276434).
    - CVE-2026-78676: fails to safely re-serialize multi-line git-config values during write operations,     corrupting dormant       quoted values into injected directives (bsc#1276433).
    - CVE-2026-78677: allowing creation of arbitrary git directories outside the intended clone destination     (bsc#1276432).
    - CVE-2026-78678: an incomplete denylist in the unsafe_git_revision_options guard that omits --contents     and -S options,       allowing attackers to read arbitrary files (bsc#1276431).
    - CVE-2026-78679: an arbitrary file read vulnerability in TagReference.create() (bsc#1276430).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
474832	Echo: python-git: security update to 3.1.56	Tenable Cloud Security	Echo Local Security Checks	Local	medium
474832	Echo: python-git: security update to 3.1.56	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
348443	SUSE SLED15 / SLES15 Security Update : python-GitPython (SUSE-SU-2026:4072-1)	Nessus	SuSE Local Security Checks	Local	critical
335369	Linux Distros Unpatched Vulnerability : CVE-2026-73621	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-73621

medium

Tenable Plugins

medium

medium

critical

medium