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TI-2026-04695 Aliases CVE-2026-5366GHSA-7pm4-56h2-5rxr

Git Argument Injection in prefecthq/prefect

Priority HIGH 76CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-94.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01034 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed prefect (PyPI): 3.6.25

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PrefectHQprefecthq/prefectup to latest—No fix listedCNA
—prefect (PyPI)3.1.11 to before 3.6.253.6.25Patch availableGHSA-7pm4-56h2-5rxr
  • prefecthq/prefect VendorPrefectHQ Affected up to latest Fixed in — No fix listed CNA
  • prefect (PyPI) Vendor— Affected 3.1.11 to before 3.6.25 Fixed in 3.6.25 Patch available GHSA-7pm4-56h2-5rxr

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:prefect:prefect:3.6.23:-:*:*:*:*:*:*3.6.23VulnerablePrefectHQ
  • cpe:2.3:a:prefect:prefect:3.6.23:-:*:*:*:*:*:* Versions 3.6.23 Vulnerable ·PrefectHQ

Remediation

  • Fix · GHSA-7pm4-56h2-5rxr prefect (PyPI) Fixed in 3.6.25 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5366
  2. 2026-10-03 Alias added: GHSA-7pm4-56h2-5rxr
  3. 2026-11-03 Fix available: PyPI/[email protected] · GHSA-7pm4-56h2-5rxr
  4. 2026-11-03 CVSS score added · GHSA-7pm4-56h2-5rxr
  5. 2026-11-03 Weakness changed · GHSA-7pm4-56h2-5rxr
  6. 2026-11-03 5 new references · GHSA-7pm4-56h2-5rxr

References

Exploit 1

Advisory 1

Other 3

  • TI-2026-03027 Authentication Bypass in prefecthq/prefect CVSS 3.0HIGH 7.5
  • TI-2023-05548 Cross-Site Request Forgery (CSRF) in prefecthq/prefect CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences