CVE-2026-54752

NetBox Device Type Library is a collection of community-sourced device type definitions for import into NetBox. The validation test harness can deserialize pull-request-controlled tracked pickle cache files through pickle.load in the readpickledata function in tests/pickleoperations.py. An unauthenticated contributor can change USELOCALKNOWNSLUGS in tests/testconfiguration.py and supply a crafted tests/known-modules.pickle or tests/known-racks.pickle file that tests/definitionstest.py loads when pytest runs. Deserialization invokes attacker-controlled object reduction behavior, allowing arbitrary code execution in the GitHub Actions runner or in a maintainer process that runs the tests, with the confidentiality, integrity, and availability of reachable resources at risk. This vulnerability is fixed with commit 1c6f7e2b93589b965318c6e67ac3504831f0e71e.