{"id":"GHSA-2fcv-qww3-9v6h","aliases":["GO-2025-4157"],"status":"published","title":"Babylon's malformed vote extensions are not rejected","description":"### Summary\n\nAdversarial validators can send large vote extensions by using non-existing protobuf tags. This will result in the rejection of the subsequent block proposal. Eventually, all block proposals will be rejected by all validators.\n\n### Impact\n\nA small group of adversarial validators can cause a chain halt.","severity":{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"high","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2025-11-24T23:32:11Z","modified":"2026-03-03T04:57:43Z","fixes":[{"ecosystem":"Go","package":"github.com/babylonlabs-io/babylon/v4","fixed_in":["4.1.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/babylonlabs-io/babylon/v4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/babylonlabs-io/babylon/v4","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.1.0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/babylonlabs-io/babylon","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/babylonlabs-io/babylon/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/babylonlabs-io/babylon/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/babylonlabs-io/babylon/v4","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.1.0"}]}]}],"references":[{"url":"https://github.com/babylonlabs-io/babylon/security/advisories/GHSA-2fcv-qww3-9v6h","tags":["web","advisory"]},{"url":"https://github.com/babylonlabs-io/babylon/pull/1873/commits/86f38abd2dca5a656195a9954bb569a08d662e2b","tags":["web","fix"]},{"url":"https://github.com/babylonlabs-io/babylon/releases/tag/v4.1.0","tags":["web"]},{"url":"https://github.com/advisories/GHSA-2fcv-qww3-9v6h"},{"url":"https://github.com/babylonlabs-io/babylon","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-2fcv-qww3-9v6h","title":"Babylon's malformed vote extensions are not rejected","description":"### Summary\n\nAdversarial validators can send large vote extensions by using non-existing protobuf tags. This will result in the rejection of the subsequent block proposal. Eventually, all block proposals will be rejected by all validators.\n\n### Impact\n\nA small group of adversarial validators can cause a chain halt.","status":"published","published":"2025-11-24T23:32:11Z","modified":"2025-11-24T23:32:12Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:39:10.178331Z"}],"osv":[{"id":"GHSA-2fcv-qww3-9v6h","title":"Babylon's malformed vote extensions are not rejected","description":"### Summary\n\nAdversarial validators can send large vote extensions by using non-existing protobuf tags. This will result in the rejection of the subsequent block proposal. Eventually, all block proposals will be rejected by all validators.\n\n### Impact\n\nA small group of adversarial validators can cause a chain halt.","status":"published","published":"2025-11-24T23:32:11Z","modified":"2025-11-27T08:58:39.215032Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:46:34.338541Z"},{"id":"GO-2025-4157","title":"Babylon's malformed vote extensions are not rejected in github.com/babylonlabs-io/babylon","description":"Babylon's malformed vote extensions are not rejected in github.com/babylonlabs-io/babylon","status":"published","published":"2025-11-25T18:12:18Z","modified":"2026-03-03T04:57:43.051347Z","updated_at":"2026-11-02T15:47:02.011123Z"}]}}