Medium severity · published Oct 1, 2026
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
6.5
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DE
devicetype-library · netbox-community
< f41fc1e48dec8d7d31afba5f13a8c73652ff5796 · source: vendor
Affected product
DE
devicetype-library
netbox-community
More from devicetype-library
9.6
CVE-2026-54752
NetBox Device Type Library: Insecure Pickle Deserialization in Test Suite Allows Remote Code Execution via Malicious Pull Request
8.8
CVE-2026-54916
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
5.3
CVE-2026-54918
NetBox Device Type Library: PR-controllable upstream clone URL (NETBOX_DT_LIBRARY_URL) enables SSRF and test-data substitution from CI