Bug 2466503 (CVE-2026-29514)

Summary: CVE-2026-29514 NetBox: NetBox: Remote code execution via malicious Python callables in templates
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in NetBox. Authenticated users with `exporttemplate` or `configtemplate` permissions can exploit a vulnerability in the `RenderTemplateMixin.get_environment_params()` method. By specifying malicious Python code in the `environment_params` field, attackers can bypass security protections and achieve remote code execution as the NetBox service user. This allows an attacker to run arbitrary commands on the system where NetBox is installed.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-05-04 19:02:36 UTC 
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.