CVE-2026-5366

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.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

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

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a	Exploit Third Party Advisory
https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:prefect:prefect:3.6.23:-:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-20 17:16

Updated : 2026-07-01 18:50

NVD link : CVE-2026-5366

Mitre link : CVE-2026-5366

CVE.ORG link : CVE-2026-5366

JSON object : View

Products Affected

prefect

prefect

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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