spamassassin
apache/spamassassinOpen-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.
defensive-toolsemail-securitymachine-learning+1
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apache/spamassassinOpen-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.
rspamd/rspamdSpam filtering and email processing framework with regex rules, statistical analysis, custom Lua plugins, and external blocklists for MTA integration.
sublime-security/sublime-rulesSublime rules for email attack detection, prevention, and threat hunting.
osquery/osquerySQL powered operating system instrumentation, monitoring, and analytics.
fevar54/cve-2026-76461-detection-kit-Defensive detection kit for CVE-2026-76461, a critical SQL injection in Cisco Secure Email Gateway, with Sigma and YARA rules, IOCs, and remediation…
falcosecurity/falcoReal-time cloud-native runtime security agent for Linux that monitors syscalls and container/Kubernetes metadata to detect anomalous behavior and…
opencti-platform/openctiOpen Cyber Threat Intelligence Platform
wazuh/wazuhOpen-source XDR and SIEM platform for threat detection, log analysis, file integrity monitoring, vulnerability assessment, and compliance management…
0xblackash/cve-2026-76461Research repository for CVE-2026-76461, a critical SQL injection in Cisco Secure Email Gateway leading to root RCE, with detection rules, mitigation…
misp/mispMISP (core software) - Open Source Threat Intelligence and Sharing Platform
stamparm/maltrailReal-time malicious traffic detection system using public blacklists, static malware trails, and heuristic analysis to identify threats across DNS,…
zeek/zeekZeek is a powerful network analysis framework that is much different from the typical IDS you may know.
wslyvh/paperweightPaperweight scans your inbox to map your digital footprint, then helps you take back control and delete your data. Local-first and open source.
amavis/amavisamavis is a high-performance email content filter framework written in Perl.
domainaware/parsedmarcA Python package and CLI for parsing aggregate and forensic DMARC reports
oisf/suricataOpen-source network IDS/IPS/NSM engine for real-time traffic inspection, intrusion detection and prevention, protocol analysis, and rule-based threat…
security-onion-solutions/securityonionOpen-source security monitoring platform for threat hunting, intrusion detection, log management, incident response, and endpoint visibility with…