{"id":"CVE-2024-55563","aliases":["EUVD-2024-52810","GHSA-82x2-v3jv-gmrq"],"status":"published","title":"Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a...","description":"Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue to CVE-2024-52913. For example, the outcome of an HTLC (Hashed Timelock Contract) can be changed because a flood of transaction traffic prevents propagation of certain Lightning channel transactions.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00674,"percentile":0.52422,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2024-12-09T00:00:00Z","modified":"2026-10-28T02:30:44Z","products":[{"vendor":"bitcoin","product":"bitcoin_core"}],"references":[{"url":"https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures","tags":["Third Party Advisory","web"]},{"url":"https://bitcoincore.org","tags":["Product","web"]},{"url":"https://delvingbitcoin.org/t/full-disclosure-transaction-relay-throughput-overflow-attacks-against-off-chain-protocols/1305","tags":["Issue Tracking","web"]},{"url":"https://gnusha.org/pi/bitcoindev/CALZpt+EptER=p+P7VN3QAb9n=dODA9_LnR9xZwWpRsdAwedv=w@mail.gmail.com/T/#u","tags":["Mailing List","web"]},{"url":"https://ariard.github.io","tags":["Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-55563","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-82x2-v3jv-gmrq"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/55xxx/CVE-2024-55563.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-55563","description":"Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue to CVE-2024-52913. For example, the outcome of an HTLC (Hashed Timelock Contract) can be changed because a flood of transaction traffic prevents propagation of certain Lightning channel transactions.","status":"published","published":"2024-12-09T00:00:00Z","modified":"2025-03-04T21:33:22.13Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"adp"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:34:22.525279Z"}],"euvd":[{"id":"EUVD-2024-52810","description":"Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue to CVE-2024-52913. For example, the outcome of an HTLC (Hashed Timelock Contract) can be changed because a flood of transaction traffic prevents propagation of certain Lightning channel transactions.","status":"published","published":"2024-12-09T00:00:00Z","modified":"2025-03-04T21:33:22Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T20:53:16.995722Z"}],"ghsa":[{"id":"GHSA-82x2-v3jv-gmrq","title":"Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a...","description":"Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue to CVE-2024-52913. For example, the outcome of an HTLC (Hashed Timelock Contract) can be changed because a flood of transaction traffic prevents propagation of certain Lightning channel transactions.","status":"published","published":"2024-12-09T03:30:59Z","modified":"2024-12-09T03:30:59Z","updated_at":"2026-11-02T14:59:04.750565Z"}],"nvd":[{"id":"CVE-2024-55563","description":"Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue to CVE-2024-52913. For example, the outcome of an HTLC (Hashed Timelock Contract) can be changed because a flood of transaction traffic prevents propagation of certain Lightning channel transactions.","status":"published","published":"2024-12-09T01:15:06.313Z","modified":"2026-06-17T08:11:14.723Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:10:39.434419Z"}],"osv":[{"id":"CVE-2024-55563","description":"Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue to CVE-2024-52913. For example, the outcome of an HTLC (Hashed Timelock Contract) can be changed because a flood of transaction traffic prevents propagation of certain Lightning channel transactions.","status":"published","published":"2024-12-09T00:00:00Z","modified":"2026-10-28T02:30:44.518454989Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:44:44.777182Z"}]}}