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.
- Score
- CVSS 3.0 9.9 Critical
- Status
- Analyzed - security@huntr.dev
- Published
- 2026-06-20
- Last modified
- 2026-10-25
- Weaknesses
- CWE-94
Affected products
References
- https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a
