CVE-2026-40519 Nginx Proxy Manager Authenticated RCE via setupCertbotPlugins()
Authenticated attackers with certificate management permissions can execute arbitrary OS commands via unsanitized input in the Certbot plugin setup function.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40519?
CVE-2026-40519 is a high-severity command injection vulnerability in NginxProxyManager nginx-proxy-manager, published on 8 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nginx Proxy Manager versions 2.9.14 through 2.15.1, fixed in commit a5db5ed, contain an authenticated remote code execution vulnerability via 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. The user-controlled dns_provider_credentials value is interpolated directly into a shell command executed via child_process.exec() without sanitization or escaping, causing the injected command to execute upon backend restart.
Weakness: CWE-78
Which versions are affected by CVE-2026-40519?
How do I fix CVE-2026-40519?
No fix has been published for CVE-2026-40519 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-40519 being exploited?
There is no known exploitation of CVE-2026-40519 in the wild and no public exploit code.
Sources
Also known as GHSA-4pgp-q8h4-9wxm.