CVE-2026-42284

HighPublic PoC

Published: 07 May 2026

Published

07 May 2026

Modified

08 May 2026

KEV Added

—

Patch

—

CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0057 43.0th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-42284 is a high-severity Argument Injection (CWE-88) vulnerability in Gitpython Project Gitpython. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked at the 43.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-28412

Vulnerability details

GitPython is a python library used to interact with Git repositories. Prior to version 3.1.47, _clone() validates multi_options as the original list, then executes shlex.split(" ".join(multi_options)). A string like "--branch main --config core.hooksPath=/x" passes validation (starts with --branch), but after…

split becomes ["--branch", "main", "--config", "core.hooksPath=/x"]. Git applies the config and executes attacker hooks during clone. This issue has been patched in version 3.1.47.

CWE(s): CWE-88

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1059 Command and Scripting Interpreter Execution

Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.

attack.mitre.org →

T1203 Exploitation for Client Execution Execution

Adversaries may exploit software vulnerabilities in client applications to execute code.

attack.mitre.org →

Why these techniques?

Argument injection (CWE-88) in GitPython _clone allows attacker-controlled Git options to set core.hooksPath and execute arbitrary hook scripts/commands during clone operations, directly enabling client-side code execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0