CVE-2026-29514: netbox · Permissive List of Allowed Inputs
Affects netboxSource CVE Database V5
Not known to be exploited · CVSS 8.7 High.
Data as of 1 Nov 2026, 22:58 UTC
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 55% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 4 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| netbox-communitynetbox | Affected
| Fixed in– |
PyPInetbox-community/netboxpkg:pypi/netbox-community/netboxOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until an official fix is available, restrict exporttemplate and configtemplate permissions to trusted users only and monitor for suspicious activity related to template rendering.
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.
References
- chocapikk.com/posts/2026/netbox-export-template-rce/ (opens in a new tab)
- github.com/netbox-community/netbox/issues/22079 (opens in a new tab)
- github.com/netbox-community/netbox/pull/22078 (opens in a new tab)
- github.com/netbox-community/netbox/pull/22170 (opens in a new tab)
- github.com/netbox-community/netbox/releases/tag/v4.6.1 (opens in a new tab)
- github.com/netbox-community/netbox/commit/d124c5fe86e12aad61285133c0caf16adcda8f2e (opens in a new tab)
- vulncheck.com/advisories/netbox-rce-via-rendertemplatemixin (opens in a new tab)