{"cve":"CVE-2020-12821","nvd":{"published":"2020-07-07T20:15:10.027","modified":"2026-06-17T02:52:22.523","status":"Modified","description":"Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":[],"references":["https://bitcoin.stackexchange.com/questions/61151/eclipse-attack-vs-sybil-attack","https://gateway.ipfs.io/ipfs/QmPWuNBs8h6a8KamRvGqhTq5UDYJRQsEEy37zDKjujQQQm/Gossipsub%20Evaluation%20Report.pdf","https://github.com/ipfs/blog/pull/450","https://github.com/libp2p/specs/blob/master/pubsub/gossipsub/gossipsub-v1.1.md","https://github.com/libp2p/specs/tree/master/pubsub/gossipsub"],"products":["protocol:gossipsub"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-12821","score":0.01937,"percentile":0.80086,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}