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CVE-2026-40519 NginxProxyManager CVE debrief

CVE-2026-40519 is an authenticated remote code execution vulnerability in Nginx Proxy Manager versions 2.9.14 through 2.15.1. The vulnerability is caused by OS command injection in the setupCertbotPlugins() function in backend/setup.js, allowing attackers with certificates:manage permission to execute arbitrary commands by storing a malicious payload in the dns_provider_credentials field.

Vendor
NginxProxyManager
Product
nginx-proxy-manager
CVSS
HIGH 7.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Users of Nginx Proxy Manager versions 2.9.14 through 2.15.1 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by the user-controlled dns_provider_credentials value being interpolated directly into a shell command executed via child_process.exec() without sanitization or escaping, causing the injected command to execute upon backend restart.

Defensive priority

HIGH

Recommended defensive actions

  • Update to a version of Nginx Proxy Manager that is not vulnerable.
  • Restrict access to the certificates:manage permission.
  • Monitor for suspicious activity.

Evidence notes

The CVE-2026-40519 vulnerability was reported by Vulncheck and is described in their advisory at [ref-6]. The fix for this vulnerability was committed in [ref-4] and is also described in [ref-5].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40519 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40519

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-40519 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40519

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.