CVE Watch18 sept 2026

CVE-2026-54916

NetBox Device Type Library is a collection of community-sourced device type definitions for import into NetBox. The absence of tests/init.py

CVSS

8.8

Alto

EPSS

0.4%

p35

KEV

—

Exploit Today

0-100

Publicado: 17 sept 2026 · Última mod.: 18 sept 2026 · CWE-427 · CWE-829

EPSS · 30d

0.4%EPSS · 30 días0.4%

2026-09-182026-09-20

Descripción técnica

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.

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