VULNERABILITY INTELLIGENCE

CVE-2026-5366

CVSS score9.9 CRITICAL
EPSS probability1.03%
CISA KEVNot currently listed
Published2026-06-20
Last modified2026-10-25
CVSS vectorCVSS: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.

Weakness classification

  • security@huntr.dev: CWE-94

Primary references