Remote Code Execution Vulnerability in NetBox by NetBox Community
CVE-2026-29514

8.7HIGH

Key Information:

Vendor

Netbox-community

Status
Netbox
Vendor
CVE Published:
4 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-29514?

NetBox versions 4.3.5 through 4.5.4 have a vulnerability that allows authenticated users with specific permissions to perform remote code execution. By manipulating the environment_params field in the RenderTemplateMixin.get_environment_params() method, attackers can bypass protections that Jinja2 SandboxedEnvironment normally provides. This is accomplished by specifying malicious Python callables that can be invoked directly, enabling attackers to execute arbitrary code with the privileges of the NetBox service user during template rendering.

Affected Version(s)

netbox 4.3.5 <= 4.5.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-29514 - Proof of Concept

References

https://chocapikk.com/posts/2026/netbox-export-template-rce/
technical-descriptionexploit
https://github.com/netbox-community/netbox/issues/22079
issue-tracking
https://github.com/netbox-community/netbox/pull/22078
issue-tracking

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Valentin Lobstein (Chocapikk)
.