Argument Injection in prefecthq/prefect

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Summary

CVECVE-2026-3515
StatePUBLISHED
Assigner@huntr_ai
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-24 05:16:39 UTC
Updated2026-05-26 20:06:20 UTC
DescriptionA vulnerability in the `GitHubRepository` block of the `prefect-github` integration in Prefect version 3.6.18 allows an attacker to inject arbitrary git command-line options via the `reference` field. The `reference` field is concatenated directly into a `git clone` command string without proper sanitization, and then parsed by `shlex.split()`. This enables injection of options such as `-c`, leading to potential Server-Side Request Forgery (SSRF), credential theft, or remote code execution (RCE). The vulnerability affects both the `aget_directory()` and `get_directory()` methods in `src/integrations/prefect-github/prefect_github/repository.py`. This issue does not affect the GitLab and BitBucket integrations, which use a safer list-based command construction approach.

Risk And Classification

Primary CVSS: v3.0 8.5 HIGH from [email protected]

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS: 0.000950000 probability, percentile 0.261840000 (date 2026-05-27)

Problem Types: CWE-88 | CWE-88 CWE-88 Improper Neutralization of Argument Delimiters in a Command

VersionSourceTypeScoreSeverityVector
3.0[email protected]Secondary8.5HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
3.0CNADECLARED8.5HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Prefecthq Prefecthq/prefect affected unspecified latest custom Not specified

References

ReferenceSourceLinkTags
huntr.com/bounties/f3b048b8-7f4e-45ef-a5a7-cb841c39acde [email protected] huntr.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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