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CVE-2026-29514

NetBox 4.3.5 - 4.5.4 RCE via RenderTemplateMixin

Published: May 4, 2026Updated: May 21, 2026 Sources: CVE List NVDCWE-183
8.8HIGH
NVD MITRE
EPSS Score
0.8%
Top 47.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-183

Affected Products

netbox-community
oss-project
netboxOn-prem
Networking Infrastructure / network-management

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

https://chocapikk.com/posts/2026/netbox-export-template-rce/
chocapikk.com
https://github.com/netbox-community/netbox/commit/d124c5fe86e12aad61285133c0caf16adcda8f2e
github.com
https://github.com/netbox-community/netbox/issues/22079
github.com
and 4 more references View all →

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