{"id":"CVE-2020-12821","aliases":["EUVD-2020-5104","GHSA-3fxj-w9rj-xjw3"],"status":"published","title":"Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil...","description":"Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01937,"percentile":0.80384,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2020-07-07T19:18:43Z","modified":"2026-06-17T02:52:22Z","products":[{"vendor":"protocol","product":"gossipsub"}],"references":[{"url":"https://github.com/libp2p/specs/tree/master/pubsub/gossipsub","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/libp2p/specs/blob/master/pubsub/gossipsub/gossipsub-v1.1.md","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://bitcoin.stackexchange.com/questions/61151/eclipse-attack-vs-sybil-attack","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/ipfs/blog/pull/450","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory"]},{"url":"https://gateway.ipfs.io/ipfs/QmPWuNBs8h6a8KamRvGqhTq5UDYJRQsEEy37zDKjujQQQm/Gossipsub%20Evaluation%20Report.pdf","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-12821"},{"url":"https://github.com/advisories/GHSA-3fxj-w9rj-xjw3"}],"sources":{"cve":[{"id":"CVE-2020-12821","description":"Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.","status":"published","published":"2020-07-07T19:18:43Z","modified":"2024-08-04T12:04:22.908Z","updated_at":"2026-11-02T14:35:52.925152Z"}],"euvd":[{"id":"EUVD-2020-5104","description":"Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.","status":"published","published":"2020-07-07T19:18:43Z","modified":"2024-08-04T12:04:22Z","updated_at":"2026-11-03T03:07:39.298733Z"}],"ghsa":[{"id":"GHSA-3fxj-w9rj-xjw3","title":"Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil...","description":"Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.","status":"published","published":"2022-05-24T17:22:29Z","modified":"2023-01-29T05:03:18Z","updated_at":"2026-11-02T14:45:17.6265Z"}],"nvd":[{"id":"CVE-2020-12821","description":"Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.","status":"published","published":"2020-07-07T20:15:10.027Z","modified":"2026-06-17T02:52:22.523Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:06:09.126752Z"}]}}