CVE-2026-3515HIGHCVSS 8.5

Prefect has an Argument Injection issue

Published May 26, 2026·Updated Jun 30, 2026

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.

Affected Packages (1)

prefectPYPI
Fixed in = 3.6.18

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

References

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