Vulnerability-Lookup

PYSEC-2026-3840

Vulnerability from pysec - Published: 2026-09-10 09:44 - Updated: 2026-09-10 11:02

Details

Summary

Repo.init() forwards **kwargs verbatim to git init with no unsafe-option guard and no allow_unsafe_options parameter. git init --template=<dir> copies <dir>/hooks/* into the new repo's .git/hooks, so an attacker-controlled template kwarg plants a hook that executes on the next git operation → arbitrary code execution. --template is already recognized as unsafe for clone (it is on unsafe_git_clone_options, and GHSA-6p8h-3wgx-97gf covers the clone path), but Repo.init is a distinct method that never received a guard and needs an independent fix.

Root Cause

Repo.init(path, mkdir, odbt, expand_vars, **kwargs) is a bare git.init(**kwargs) (git/repo/base.py:1435) with no check_unsafe_options and no allow_unsafe_options.

Impact

Arbitrary code execution (hook fires on next git op) at the privileges of the host process. Two preconditions raise attack complexity (AC:H): the app must forward a template= kwarg (KEY control) AND the attacker must stage an executable hook directory at a known path — the same profile GHSA-6p8h-3wgx-97gf accepted as HIGH for the clone path. Default allow_unsafe_options is irrelevant here because Repo.init has no guard at all.

Proof of Concept

# attacker stages /evil/hooks/post-commit (executable)
from git import Repo
Repo.init(path, template="/evil")
# next commit runs /evil/hooks/post-commit -> ACE

Attack Chain

Entry: attacker stages /evil/hooks/post-commit (executable) and gets the app to call Repo.init(path, template='/evil').
Check: NONE on Repo.init. Bypass proof: base.py:1435 is a bare git.init(**kwargs). argv (observed): ['git','init','--template=/evil'].
Sink: git copies /evil/hooks/post-commit → <repo>/.git/hooks/post-commit.
Impact: next commit runs the hook → arbitrary code execution.

Bypass Evidence

Independently reproduced (gate harness): Repo.init(dst, template='<evil>') → argv ['git','init','--template=<evil>'] unguarded; hook copied into .git/hooks/post-commit; after git commit the INIT_ACE marker was created. --separate-git-dir=<path> is a parallel arbitrary-redirect vector through the same unguarded sink (value control only).

Affected Versions

GitPython <= 3.1.57 (unguarded git.init(**kwargs) present verbatim on the latest release tag).

Suggested Fix

Add a check_unsafe_options guard (with an allow_unsafe_options parameter) to Repo.init, consulting a denylist that includes --template and --separate-git-dir (path-taking / hook-installing options).

Reported by zx (Jace) — GitHub: @manus-use

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Impacted products

Name	purl
gitpython	pkg:pypi/gitpython

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "gitpython",
        "purl": "pkg:pypi/gitpython"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.58"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1.7",
        "0.2.0-beta1",
        "0.3.0-beta1",
        "0.3.0-beta2",
        "0.3.1-beta2",
        "0.3.2",
        "0.3.2.1",
        "0.3.2.RC1",
        "0.3.3",
        "0.3.4",
        "0.3.5",
        "0.3.6",
        "0.3.7",
        "1.0.0",
        "1.0.1",
        "1.0.2",
        "2.0.0",
        "2.0.1",
        "2.0.2",
        "2.0.3",
        "2.0.4",
        "2.0.5",
        "2.0.6",
        "2.0.7",
        "2.0.8",
        "2.0.9",
        "2.0.9.dev0",
        "2.0.9.dev1",
        "2.1.0",
        "2.1.1",
        "2.1.10",
        "2.1.11",
        "2.1.12",
        "2.1.13",
        "2.1.14",
        "2.1.15",
        "2.1.2",
        "2.1.3",
        "2.1.4",
        "2.1.5",
        "2.1.6",
        "2.1.7",
        "2.1.8",
        "2.1.9",
        "3.0.0",
        "3.0.1",
        "3.0.2",
        "3.0.3",
        "3.0.4",
        "3.0.5",
        "3.0.6",
        "3.0.7",
        "3.0.8",
        "3.0.9",
        "3.1.0",
        "3.1.1",
        "3.1.10",
        "3.1.11",
        "3.1.12",
        "3.1.13",
        "3.1.14",
        "3.1.15",
        "3.1.16",
        "3.1.17",
        "3.1.18",
        "3.1.19",
        "3.1.2",
        "3.1.20",
        "3.1.22",
        "3.1.23",
        "3.1.24",
        "3.1.25",
        "3.1.26",
        "3.1.27",
        "3.1.28",
        "3.1.29",
        "3.1.3",
        "3.1.30",
        "3.1.31",
        "3.1.32",
        "3.1.33",
        "3.1.34",
        "3.1.35",
        "3.1.36",
        "3.1.37",
        "3.1.38",
        "3.1.4",
        "3.1.40",
        "3.1.41",
        "3.1.42",
        "3.1.43",
        "3.1.44",
        "3.1.45",
        "3.1.46",
        "3.1.47",
        "3.1.48",
        "3.1.49",
        "3.1.5",
        "3.1.50",
        "3.1.51",
        "3.1.52",
        "3.1.53",
        "3.1.54",
        "3.1.55",
        "3.1.56",
        "3.1.57",
        "3.1.6",
        "3.1.7",
        "3.1.8",
        "3.1.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-76218",
    "GHSA-9rj7-rf2p-w77r"
  ],
  "details": "## Summary\n`Repo.init()` forwards `**kwargs` verbatim to `git init` with no unsafe-option guard and no `allow_unsafe_options` parameter. `git init --template=\u003cdir\u003e` copies `\u003cdir\u003e/hooks/*` into the new repo\u0027s `.git/hooks`, so an attacker-controlled `template` kwarg plants a hook that executes on the next git operation \u2192 arbitrary code execution. `--template` is already recognized as unsafe for clone (it is on `unsafe_git_clone_options`, and GHSA-6p8h-3wgx-97gf covers the clone path), but `Repo.init` is a distinct method that never received a guard and needs an independent fix.\n\n## Root Cause\n`Repo.init(path, mkdir, odbt, expand_vars, **kwargs)` is a bare `git.init(**kwargs)` (git/repo/base.py:1435) with no `check_unsafe_options` and no `allow_unsafe_options`.\n\n## Impact\nArbitrary code execution (hook fires on next git op) at the privileges of the host process. Two preconditions raise attack complexity (AC:H): the app must forward a `template=` kwarg (KEY control) AND the attacker must stage an executable hook directory at a known path \u2014 the same profile GHSA-6p8h-3wgx-97gf accepted as HIGH for the clone path. Default `allow_unsafe_options` is irrelevant here because `Repo.init` has no guard at all.\n\n## Proof of Concept\n```python\n# attacker stages /evil/hooks/post-commit (executable)\nfrom git import Repo\nRepo.init(path, template=\"/evil\")\n# next commit runs /evil/hooks/post-commit -\u003e ACE\n```\n\n## Attack Chain\n1. Entry: attacker stages `/evil/hooks/post-commit` (executable) and gets the app to call `Repo.init(path, template=\u0027/evil\u0027)`.\n2. Check: NONE on `Repo.init`. Bypass proof: base.py:1435 is a bare `git.init(**kwargs)`. argv (observed): `[\u0027git\u0027,\u0027init\u0027,\u0027--template=/evil\u0027]`.\n3. Sink: git copies `/evil/hooks/post-commit` \u2192 `\u003crepo\u003e/.git/hooks/post-commit`.\n4. Impact: next commit runs the hook \u2192 arbitrary code execution.\n\n## Bypass Evidence\nIndependently reproduced (gate harness): `Repo.init(dst, template=\u0027\u003cevil\u003e\u0027)` \u2192 argv `[\u0027git\u0027,\u0027init\u0027,\u0027--template=\u003cevil\u003e\u0027]` unguarded; hook copied into `.git/hooks/post-commit`; after `git commit` the `INIT_ACE` marker was created. `--separate-git-dir=\u003cpath\u003e` is a parallel arbitrary-redirect vector through the same unguarded sink (value control only).\n\n## Affected Versions\n`GitPython \u003c= 3.1.57` (unguarded `git.init(**kwargs)` present verbatim on the latest release tag).\n\n## Suggested Fix\nAdd a `check_unsafe_options` guard (with an `allow_unsafe_options` parameter) to `Repo.init`, consulting a denylist that includes `--template` and `--separate-git-dir` (path-taking / hook-installing options).\n\n---\nReported by **zx (Jace)** \u2014 GitHub: @manus-use",
  "id": "PYSEC-2026-3840",
  "modified": "2026-09-10T11:02:07.413388Z",
  "published": "2026-09-10T09:44:51.318929Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-9rj7-rf2p-w77r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76218"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/pull/2204"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/commit/d9ddb55bdc66"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gitpython-developers/GitPython"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/releases/tag/3.1.58"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/gitpython-before-remote-code-execution-via-repo-init"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/gitpython"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-9rj7-rf2p-w77r"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "GitPython: Unguarded git option forwarding in Repo.init enables arbitrary command execution via --template clone hooks"
}

CVE-2026-76218 (GCVE-0-2026-76218)

Vulnerability from cvelistv5 – Published: 2026-08-19 14:02 – Updated: 2026-08-20 18:39

Title

GitPython before 3.1.58 Remote Code Execution via Repo.init

Summary

GitPython before 3.1.58 contains a remote code execution vulnerability in Repo.init that forwards unsafe git options without validation. Attackers can supply a template parameter pointing to a directory with malicious git hooks that execute arbitrary code when git operations are performed on the initialized repository.

Severity

7.7 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 03:56 UTC

CWE

CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Assigner

VulnCheck mitre root

References

2 references

URL	Tags
https://github.com/gitpython-developers/GitPython…	vendor-advisory
https://www.vulncheck.com/advisories/gitpython-be…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
gitpython-developers	GitPython	Affected: 0 , < 3.1.58 (semver) Unaffected: 3.1.58 (semver) cpe:2.3:a:gitpython_project:gitpython::::::::

Date Public

2026-08-04 00:00

Credits

manus-use BarakSrour

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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              "content": {
                "id": "CVE-2026-76218",
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    "cna": {
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GHSA-9RJ7-RF2P-W77R

Vulnerability from github – Published: 2026-08-07 15:36 – Updated: 2026-09-08 20:54

Summary

GitPython: Unguarded git option forwarding in Repo.init enables arbitrary command execution via --template clone hooks

Details

Summary

Root Cause

Repo.init(path, mkdir, odbt, expand_vars, **kwargs) is a bare git.init(**kwargs) (git/repo/base.py:1435) with no check_unsafe_options and no allow_unsafe_options.

Impact

Proof of Concept

# attacker stages /evil/hooks/post-commit (executable)
from git import Repo
Repo.init(path, template="/evil")
# next commit runs /evil/hooks/post-commit -> ACE

Attack Chain

Entry: attacker stages /evil/hooks/post-commit (executable) and gets the app to call Repo.init(path, template='/evil').
Check: NONE on Repo.init. Bypass proof: base.py:1435 is a bare git.init(**kwargs). argv (observed): ['git','init','--template=/evil'].
Sink: git copies /evil/hooks/post-commit → <repo>/.git/hooks/post-commit.
Impact: next commit runs the hook → arbitrary code execution.

Bypass Evidence

Affected Versions

GitPython <= 3.1.57 (unguarded git.init(**kwargs) present verbatim on the latest release tag).

Suggested Fix

Reported by zx (Jace) — GitHub: @manus-use

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.57"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "GitPython"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.58"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-76218"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-88",
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-07T15:36:43Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Summary\n`Repo.init()` forwards `**kwargs` verbatim to `git init` with no unsafe-option guard and no `allow_unsafe_options` parameter. `git init --template=\u003cdir\u003e` copies `\u003cdir\u003e/hooks/*` into the new repo\u0027s `.git/hooks`, so an attacker-controlled `template` kwarg plants a hook that executes on the next git operation \u2192 arbitrary code execution. `--template` is already recognized as unsafe for clone (it is on `unsafe_git_clone_options`, and GHSA-6p8h-3wgx-97gf covers the clone path), but `Repo.init` is a distinct method that never received a guard and needs an independent fix.\n\n## Root Cause\n`Repo.init(path, mkdir, odbt, expand_vars, **kwargs)` is a bare `git.init(**kwargs)` (git/repo/base.py:1435) with no `check_unsafe_options` and no `allow_unsafe_options`.\n\n## Impact\nArbitrary code execution (hook fires on next git op) at the privileges of the host process. Two preconditions raise attack complexity (AC:H): the app must forward a `template=` kwarg (KEY control) AND the attacker must stage an executable hook directory at a known path \u2014 the same profile GHSA-6p8h-3wgx-97gf accepted as HIGH for the clone path. Default `allow_unsafe_options` is irrelevant here because `Repo.init` has no guard at all.\n\n## Proof of Concept\n```python\n# attacker stages /evil/hooks/post-commit (executable)\nfrom git import Repo\nRepo.init(path, template=\"/evil\")\n# next commit runs /evil/hooks/post-commit -\u003e ACE\n```\n\n## Attack Chain\n1. Entry: attacker stages `/evil/hooks/post-commit` (executable) and gets the app to call `Repo.init(path, template=\u0027/evil\u0027)`.\n2. Check: NONE on `Repo.init`. Bypass proof: base.py:1435 is a bare `git.init(**kwargs)`. argv (observed): `[\u0027git\u0027,\u0027init\u0027,\u0027--template=/evil\u0027]`.\n3. Sink: git copies `/evil/hooks/post-commit` \u2192 `\u003crepo\u003e/.git/hooks/post-commit`.\n4. Impact: next commit runs the hook \u2192 arbitrary code execution.\n\n## Bypass Evidence\nIndependently reproduced (gate harness): `Repo.init(dst, template=\u0027\u003cevil\u003e\u0027)` \u2192 argv `[\u0027git\u0027,\u0027init\u0027,\u0027--template=\u003cevil\u003e\u0027]` unguarded; hook copied into `.git/hooks/post-commit`; after `git commit` the `INIT_ACE` marker was created. `--separate-git-dir=\u003cpath\u003e` is a parallel arbitrary-redirect vector through the same unguarded sink (value control only).\n\n## Affected Versions\n`GitPython \u003c= 3.1.57` (unguarded `git.init(**kwargs)` present verbatim on the latest release tag).\n\n## Suggested Fix\nAdd a `check_unsafe_options` guard (with an `allow_unsafe_options` parameter) to `Repo.init`, consulting a denylist that includes `--template` and `--separate-git-dir` (path-taking / hook-installing options).\n\n---\nReported by **zx (Jace)** \u2014 GitHub: @manus-use",
  "id": "GHSA-9rj7-rf2p-w77r",
  "modified": "2026-09-08T20:54:14Z",
  "published": "2026-08-07T15:36:43Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-9rj7-rf2p-w77r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76218"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/pull/2204"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/commit/d9ddb55bdc66"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gitpython-developers/GitPython"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/releases/tag/3.1.58"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/gitpython-before-remote-code-execution-via-repo-init"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "GitPython: Unguarded git option forwarding in Repo.init enables arbitrary command execution via --template clone hooks"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

PYSEC-2026-3840

Summary

Root Cause

Impact

Proof of Concept

Attack Chain

Bypass Evidence

Affected Versions

Suggested Fix

CVE-2026-76218 (GCVE-0-2026-76218)

GHSA-9RJ7-RF2P-W77R

Summary

Root Cause

Impact

Proof of Concept

Attack Chain

Bypass Evidence

Affected Versions

Suggested Fix

Tags

Sightings

Nomenclature