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CVE-2026-55251— NetBox Device Type Library: Arbitrary Code Execution on CI Runner Through Malicious requirements.txt, .pre-commit-hooks-config.yaml, and .gitmodules Files

Quick assessment

Affected
netbox-community devicetype-library
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NetBox 设备类型库（Device Type Library）是一个用于导入 NetBox 的社区贡献的设备类型定义集合。在提交 f41fc1e 之前，CI 工作流 会在 事件触发时执行，并在任何维护者审查之前运行由拉取请求（PR）提供的代码。该流程受三个可通过 PR 编辑的文件驱动： 、 / 以及 。这意味着，即使是没有特殊仓库访问权限的贡献者，也可以提交一个修改这些文件的拉取请求，从而使其代码在 CI 运行器上执行。该问题已通过提交 f41fc1e 进行修复。

CVSS 6.5 · Medium EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1195 · Supply Chain Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
netbox-community devicetype-library < f41fc1e48dec8d7d31afba5f13a8c73652ff5796 affected
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I. Basic Information for CVE-2026-55251

Vulnerability Information
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Vulnerability Title
NetBox Device Type Library: Arbitrary Code Execution on CI Runner Through Malicious requirements.txt, .pre-commit-hooks-config.yaml, and .gitmodules Files
Source: CVE Program / CVE List V5
Vulnerability Description
NetBox Device Type Library is a collection of community-sourced device type definitions for import into NetBox. Prior to commit f41fc1e, the CI workflow .github/workflows/validation.yml runs on pull_request and executes code supplied by the pull request before any maintainer review. Three PR-editable files drive this: "requirements.txt", ".pre-commit-hooks-config.yaml" / ".pre-commit-yamlfmt-config.yaml", and ".gitmodules". A contributor with no special repository access could open a pull request that modifies these files and have their code run on the CI runner. This issue has been patched via commit f41fc1e.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
netbox-community devicetype-library < f41fc1e48dec8d7d31afba5f13a8c73652ff5796 -

II. Public POCs for CVE-2026-55251

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III. Intelligence Information for CVE-2026-55251

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Patches & Fixes for CVE-2026-55251 (1)

Vendor Advisories for CVE-2026-55251 (1)

IV. Related Vulnerabilities

Same product: devicetype-library
Same vendor: netbox-community
Same weakness: CWE-94

V. Comments for CVE-2026-55251

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