CVE-2026-3515
HighSummary
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. This leads to potential Server-Side Request Forgery (SSRF), credential theft, or remote code execution (RCE).
Risk Assessment
Organizations may face serious threats such as data theft or remote code execution, which can lead to loss of confidentiality and integrity of systems.
Recommendation
It is recommended to update to the latest version of Prefect to mitigate this vulnerability and to implement additional input sanitization mechanisms in integrations with external systems.
Original NVD description (English source)
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.