Open source alternatives to Nessus

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nucleiv3.11.1projectdiscovery/nuclei

Nuclei is a fast, customizable vulnerability scanner powered by the global security community and built on a simple YAML-based DSL, enabling collaboration to tackle trending vulnerabilities on the internet. It helps you find vulnerabilities in your applications, APIs, networks, DNS, and cloud configurations.

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zaproxyv2.17.0zaproxy/zaproxy

The ZAP by Checkmarx Core project