TI-2026-39924 Aliases CVE-2026-55251

Code injection in netbox-community devicetype-library

HIGH 68CWE-494Published 2026-10-01 · Updated 2026-10-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-494.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00127 2nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
netbox-community	devicetype-library	< f41fc1e	—	No fix listed	CNA

devicetype-library Vendornetbox-community Affected < f41fc1e Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-55251
2026-10-06 CISA SSVC decision points changed
2026-10-06 Priority changed: LOW → HIGH

References

Other 2

TI-2026-39558 Deserialization of untrusted data in netbox-community devicetype-library CVSS 3.1CRITICAL 9.6
TI-2026-23330 NetBox 4.3.5 - 4.5.4 RCE via RenderTemplateMixin CVSS 4.0HIGH 8.7
TI-2026-58964 NetBox through 4.7.0 Credential Disclosure via REST and GraphQL APIs CVSS 4.0HIGH 7.1
TI-2026-84457 Broken access control in NetBox bulk component creation CVSS 4.0MEDIUM 5.3
TI-2026-39685 Uncontrolled search path in netbox-community devicetype-library CVSS 3.1HIGH 8.8
TI-2026-68595 Template injection in NetBox custom links leaks session cookies CVSS 4.0MEDIUM 6.9

See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences