Vulnerability-Lookup is an open-source platform run by CIRCL that aggregates vulnerability advisories from many sources (CVE, GitHub, PySec, and more), enriches them with sightings from MISP, Exploit-DB, Mastodon, Telegram, Nuclei and others, and federates five Known Exploited Vulnerabilities catalogs (CISA, CIRCL, ENISA / EU CSIRTs Network, The Shadowserver Foundation, Previdian) through the GCVE initiative.