CVE-2026-54916: high-severity vulnerability in netbox-community devicetype-library
NetBox Device Type Library: Module Shadowing Bypass of prior pickle fix - RCE via missing `tests/__init__.py` + SSRF via unfixed `NETBOX_DT_LIBRARY_URL` → Cloud Metadata credential theft
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.6%
NetBox Device Type Library is a collection of community-sourced device type definitions for import into NetBox. The absence of tests/init.py and the lack of --import-mode=importlib cause pytest prepend import mode to place the tests directory at the front of sys.path during collection. An unauthenticated contributor can add a module such as tests/git.py that shadows GitPython when tests/definitions_test.py executes from git import Git, Repo, or add tests/conftest.py for automatic collection-time execution. Python imports and runs the pull-request module before any test function, allowing arbitrary code execution on the GitHub Actions runner, test-result tampering, and access to tokens or network resources exposed to the workflow. This module-shadowing path is independent of the earlier pickle deserialization flaw and the separately tracked NETBOX_DT_LIBRARY_URL issue. This vulnerability is fixed by commit b0d9a3dadd0a0a9d3c93b0b2777559fd4bad1037.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
netbox-community · devicetype-libraryRelated CVEs — netbox-community devicetype-library
In the same product, most dangerous first.
CVE-2026-54752CRITICALNetBox Device Type Library: Insecure Pickle Deserialization in Test Suite Allows Remote Code Execution via Malicious Pull RequestEPSS 0.7%CVE-2026-54918MEDIUMNetBox Device Type Library: PR-controllable upstream clone URL (NETBOX_DT_LIBRARY_URL) enables SSRF and test-data substitution from CIEPSS 0.4%CVE-2026-55251MEDIUMNetBox Device Type Library: Arbitrary Code Execution on CI Runner Through Malicious requirements.txt, .pre-commit-hooks-config.yaml, and .gitmodules FilesEPSS 0.1%