CVE-2026-44797: SSRF in Nautobot ≤3.1.1

The SSRF vulnerability in Nautobot arises from the ability of users to configure Webhooks that can initiate requests to arbitrary destinations. An attacker could leverage this to scan internal networks, access sensitive resources behind firewalls, or even interact with internal services that should not be publicly accessible. This could lead to data exfiltration, privilege escalation, or denial of service. The impact is amplified if the Nautobot instance is deployed in an environment with sensitive internal resources or if it's used to manage critical infrastructure. The ability to bypass access controls and directly interact with internal systems makes this a significant security risk.

1. Gepubliceerd2026-05-13

The primary mitigation for CVE-2026-44797 is to upgrade to Nautobot version 2.4.33 or 3.1.2. These versions include fixes that restrict Webhook requests to HTTP or HTTPS schemes by default. If immediate upgrading is not possible, consider implementing a Web Application Firewall (WAF) or proxy to filter outbound requests from the Nautobot instance, blocking requests to suspicious or unauthorized destinations. Additionally, review existing Webhook configurations to identify and disable any that might be vulnerable. The new settings variables WEBHOOKALLOWEDSCHEMES can be used to further restrict allowed schemes.