{"cve":"CVE-2020-26896","nvd":{"published":"2020-10-21T02:15:12.737","modified":"2026-06-17T03:08:29.173","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","score":8.2},"cwes":["CWE-354"],"references":["https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402d","https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.html","https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.html","https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402d","https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.html"],"products":["lightning_network_daemon_project:lightning_network_daemon"],"source":"nvd","synced_at":"2026-10-19T21:09:53.489947993+00:00"},"epss":{"cve":"CVE-2020-26896","score":0.00738,"percentile":0.5455,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}