GitHub Advisoryadvisory · PyPI

GHSA-cw25-2p92-7f75 Prefect has an Argument Injection issue

HIGH Published 2026-05-26 Modified 2026-06-30 Official page ↗
Aliases
CVE-2026-3515
Ecosystem
PyPI
Packages
prefect
Severity
High
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Weaknesses
CWE-88
Reviewed
2026-06-30

Affected packages

• PyPI prefect: <= 3.6.18 (no fix yet)

Description

A vulnerability in the `GitHubRepository` block of the `prefect-github` integration in Prefect version 3.6.18 allows an attacker to inject arbitrary git command-line options via the `reference` field. The `reference` field is concatenated directly into a `git clone` command string without proper sanitization, and then parsed by `shlex.split()`. This enables injection of options such as `-c`, leading to potential Server-Side Request Forgery (SSRF), credential theft, or remote code execution (RCE). The vulnerability affects both the `aget_directory()` and `get_directory()` methods in `src/integrations/prefect-github/prefect_github/repository.py`. This issue does not affect the GitLab and BitBucket integrations, which use a safer list-based command construction approach.

Related

Alias · CVE (1)

  • CVE-2026-3515 A vulnerability in the `GitHubRepository` block of the `prefect-github` integration in Prefect version 3.6.18 allows an attacker to inject… vulnerability

Weakness · CWE (1)

  • CWE-88 Improper Neutralization of Argument Delimiters in a Command weakness

References