Prefect has an Argument Injection issue
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| prefect PyPI | <= 3.6.18 | No fix yet |
Details and references
- CVSS 3.0
- CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-88
- Also known as
- CVE-2026-3515, PYSEC-2026-2957