Read the docs
TI-2026-23330 Aliases CVE-2026-29514GHSA-f249-4qx6-hg68

NetBox 4.3.5 - 4.5.4 RCE via RenderTemplateMixin

Priority HIGH 73CWE-183Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

NetBox versions 4.3.5 through 4.5.4 contain a remote code execution vulnerability in the RenderTemplateMixin.get_environment_params() method that allows authenticated users with exporttemplate or configtemplate permissions to execute arbitrary code by specifying malicious Python callables in the environment_params field. Attackers can bypass Jinja2 SandboxedEnvironment protections by setting the finalize parameter to any importable Python callable such as subprocess.getoutput, which is invoked on every rendered expression outside the sandbox's call interception mechanism, achieving remote code execution as the NetBox service user.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00782 56th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
netbox-communitynetbox4.3.5 – 4.5.4—No fix listedCNA
  • netbox Vendornetbox-community Affected 4.3.5 – 4.5.4 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-29514
  2. 2026-10-03 Alias added: GHSA-f249-4qx6-hg68

References

Exploit 1

Patch 3

Other 2

  • TI-2026-39558 Deserialization of untrusted data in netbox-community devicetype-library CVSS 3.1CRITICAL 9.6
  • TI-2026-39924 Code injection in netbox-community devicetype-library CVSS 3.1MEDIUM 6.5
  • 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