GHSA-9557-234j-7rv9: Duplicate Advisory Remote Code Execution Vulnerability

CRITICAL
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CVSS 9.8
CWE-88
Published
Advisory Summary

GHSA-9557-234j-7rv9 is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')) affecting Duplicate Advisory libraries in the PyPI ecosystem. The issue involves dormant multi-line git-config values are corrupted into live injected directives (e.g. core.hookspath) on any unrelated gitconfigparser write, enabling rce. Remediation is available in the latest vendor maintenance releases.

GHSA-9557-234j-7rv9 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-9557-234j-7rv9
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Affected Product Duplicate Advisory
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix GHSA-9557-234j-7rv9

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

GitPython fixed: Latest secure release 
pip install GitPython>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show GitPython

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-9557-234j-7rv9, inspect your installed packages using pip:

pip show GitPython

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show GitPython command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection'), where the product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-284h-m62q-gf8w. This link is maintained to preserve external references. ## Original Description GitPython before 3.1.59 fails to safely re-serialize multi-line git-config values during write operations, corrupting dormant quoted values into injected directives like core.hooksPath. Attackers can craft config files with embedded newlines that become live git directives after any unrelated GitPython config write, enabling arbitrary code execution via hook invocation.

GHSA-9557-234j-7rv9 Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
GitPython
pypi/GitPython
PyPI
≤ 3.1.58

References

GitHub Advisory / Wiki ADVISORY
https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-284h-m62q-gf8w
NVD — GHSA-9557-234j-7rv9 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78676
www.vulncheck.com/advisories/gitpytho... WEB
https://www.vulncheck.com/advisories/gitpython-before-remote-code-execution-via-config-injection

Frequently Asked Questions

What is GHSA-9557-234j-7rv9?
GHSA-9557-234j-7rv9 is a security vulnerability in Duplicate Advisory involving Dormant multi-line git-config values are corrupted into live injected directives (e.g. core.hooksPath) on any unrelated GitConfigParser write, enabling RCE under CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection').
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: GitPython.
What version fixes GHSA-9557-234j-7rv9?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is GitPython affected?
Yes, GitPython is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-9557-234j-7rv9?
GHSA-9557-234j-7rv9 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-9557-234j-7rv9?
GHSA-9557-234j-7rv9 is classified under CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') (The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string.).
How can I check PyPI dependencies for GHSA-9557-234j-7rv9?
Run the dependency tree command: 'pip show GitPython'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9557-234j-7rv9",
  "modified" : "2026-09-08T18:39:17Z",
  "published" : "2026-08-25T03:32:10Z",
  "withdrawn" : "2026-09-08T18:39:17Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Dormant multi-line git-config values are corrupted into live injected directives (e.g. core.hooksPath) on any unrelated GitConfigParser write, enabling RCE",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-284h-m62q-gf8w. This link is maintained to preserve external references.\n\n## Original Description\nGitPython before 3.1.59 fails to safely re-serialize multi-line git-config values during write operations, corrupting dormant quoted values into injected directives like core.hooksPath. Attackers can craft config files with embedded newlines that become live git directives after any unrelated GitPython config write, enabling arbitrary code execution via hook invocation.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "GitPython"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.1.58"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-284h-m62q-gf8w"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-78676"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/gitpython-before-remote-code-execution-via-config-injection"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-88" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-08T18:39:17Z",
    "nvd_published_at" : "2026-08-25T02:16:52Z"
  }
}