CVE-2026-29514

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://chocapikk.com/posts/2026/netbox-export-template-rce/
https://github.com/netbox-community/netbox/commit/d124c5fe86e12aad61285133c0caf16adcda8f2e
https://github.com/netbox-community/netbox/issues/22079
https://github.com/netbox-community/netbox/pull/22078
https://github.com/netbox-community/netbox/pull/22170
https://github.com/netbox-community/netbox/releases/tag/v4.6.1
https://www.vulncheck.com/advisories/netbox-rce-via-rendertemplatemixin

Configurations

No configuration.

History

21 May 2026, 16:16

Type	Values Removed	Values Added
References		() https://github.com/netbox-community/netbox/commit/d124c5fe86e12aad61285133c0caf16adcda8f2e - () https://github.com/netbox-community/netbox/pull/22170 - () https://github.com/netbox-community/netbox/releases/tag/v4.6.1 -

04 May 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-04 17:16

Updated : 2026-06-17 10:29

NVD link : CVE-2026-29514

Mitre link : CVE-2026-29514

CVE.ORG link : CVE-2026-29514

JSON object : View

Products Affected

No product.

CWE

CWE-183

Permissive List of Allowed Inputs

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