{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc1:*:*:*:*:*:*",
              "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc2:*:*:*:*:*:*",
              "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc3:*:*:*:*:*:*",
              "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc4:*:*:*:*:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "0.11.0-beta_rc1"
              },
              {
                "last_affected": "0.11.0-beta_rc1"
              },
              {
                "introduced": "0.11.0-beta_rc2"
              },
              {
                "last_affected": "0.11.0-beta_rc2"
              },
              {
                "introduced": "0.11.0-beta_rc3"
              },
              {
                "last_affected": "0.11.0-beta_rc3"
              },
              {
                "introduced": "0.11.0-beta_rc4"
              },
              {
                "last_affected": "0.11.0-beta_rc4"
              }
            ],
            "source": "CPE_STRING"
          },
          "events": [
            {
              "introduced": "247b7530caf08a555ffd56f81019031bc1af6565"
            },
            {
              "last_affected": "fc12656a1a62e5d69430bba6e4feb8cfbaf21542"
            }
          ],
          "repo": "https://github.com/lightningnetwork/lnd",
          "type": "GIT"
        }
      ],
      "versions": [
        "0.11.0-beta_rc1",
        "0.11.0-beta_rc2",
        "0.11.0-beta_rc3",
        "0.11.0-beta_rc4"
      ]
    }
  ],
  "database_specific": {
    "unresolved_ranges": [
      {
        "cpes": [
          "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:*:*:*:*:*:*:*:*"
        ],
        "extracted_events": [
          {
            "fixed": "0.11.0"
          }
        ],
        "source": "CPE_RANGE",
        "vendor_product": "lightning_network_daemon_project:lightning_network_daemon"
      },
      {
        "cpes": [
          "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:-:*:*:*:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "0.11.0-NA"
          },
          {
            "last_affected": "0.11.0-NA"
          }
        ],
        "source": "CPE_STRING",
        "vendor_product": "lightning_network_daemon_project:lightning_network_daemon"
      }
    ]
  },
  "details": "Prior to 0.11.0-beta, LND (Lightning Network Daemon) had a vulnerability in its invoice database. While claiming on-chain a received HTLC output, it didn't verify that the corresponding outgoing off-chain HTLC was already settled before releasing the preimage. In the case of a hash-and-amount collision with an invoice, the preimage for an expected payment was instead released. A malicious peer could have deliberately intercepted an HTLC intended for the victim node, probed the preimage through a colluding relayed HTLC, and stolen the intercepted HTLC. The impact is a loss of funds in certain situations, and a weakening of the victim's receiver privacy.",
  "id": "CVE-2020-26896",
  "modified": "2026-07-08T05:38:42.827732637Z",
  "published": "2020-10-21T02:15:12.737Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402d"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.html"
    },
    {
      "type": "FIX",
      "url": "https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.html"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}