Git Argument Injection in prefecthq/prefect_CVE-2026-5366

9.9 / 10

CRITICAL

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

Description

Prefect version 3.6.23 is vulnerable to remote code execution due to improper handling of user-controlled input in the `GitRepository` storage class. The `commit_sha` parameter, which is passed to git commands, lacks validation and does not include a `--` separator to distinguish user input from git flags. This allows attackers to inject arbitrary git flags, such as `--upload-pack`, enabling execution of external programs. Additionally, the `directories` parameter can be exploited to inject git flags during sparse-checkout operations. These vulnerabilities allow any user with deployment creation permissions to execute arbitrary commands on worker machines, compromising shared work pools in multi-tenant environments.

Basic Information

ID CVE-2026-5366

Source @huntr_ai

Published Jun 20, 2026 at 16:43

Affected Product

Vendor prefecthq

Product prefecthq/prefect

Version unspecified

Affected Versions prefecthq prefecthq/prefect unspecified

CWE Classification

CWE-94

References

huntr.com /bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a

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    "published": "2026-06-20T16:43:37.345Z",
    "modified": "2026-06-20T16:43:37.345Z",
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