{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:bitcoin:bitcoin_core:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "27.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "bf03c458e994abab9be85486ed8a6d8813313579"
            }
          ],
          "repo": "https://github.com/bitcoin/bitcoin",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/55xxx/CVE-2024-55563.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "27.2"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "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.",
  "id": "CVE-2024-55563",
  "modified": "2026-07-15T01:49:15.219727419Z",
  "published": "2024-12-09T00:00:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://ariard.github.io"
    },
    {
      "type": "WEB",
      "url": "https://bitcoincore.org"
    },
    {
      "type": "WEB",
      "url": "https://delvingbitcoin.org/t/full-disclosure-transaction-relay-throughput-overflow-attacks-against-off-chain-protocols/1305"
    },
    {
      "type": "WEB",
      "url": "https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures"
    },
    {
      "type": "WEB",
      "url": "https://gnusha.org/pi/bitcoindev/CALZpt+EptER=p+P7VN3QAb9n=dODA9_LnR9xZwWpRsdAwedv=w@mail.gmail.com/T/#u"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/55xxx/CVE-2024-55563.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-55563"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}