CVE-2026-5366Git Argument Injection in prefecthq/prefect
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 9.9 CRITICAL (v3.0, CNA)CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- @huntr_ai
- NVD analysis
- Analyzed
- Record last updated
- Jun 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
prefecthq prefecthq/prefect prefecthq:prefect (from the name) | from unspecified through latest | CNA record |
prefect prefect prefect:prefect | 3.6.23 | NVD |
References
- https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07aexploit, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.