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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.

PUBLISHED Reserved 2026-03-04 | Published 2026-05-24 | Updated 2026-05-26 | Assigner @huntr_ai




HIGH: 8.5CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Problem types

CWE-88 Improper Neutralization of Argument Delimiters in a Command

Product status

Any version
affected

References

huntr.com/bounties/f3b048b8-7f4e-45ef-a5a7-cb841c39acde

cve.org (CVE-2026-3515)

nvd.nist.gov (CVE-2026-3515)

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