{"id":"CVE-2026-117603","aliases":[],"title":"Electrum before 4.7.2 Nostr Wallet Connect Plugin Daily Spending Limit Bypass","description":"Electrum before 4.7.2 contains a spending limit bypass vulnerability in the Nostr Wallet Connect plugin that allows malicious NWC clients to exceed daily_limit_sat by exploiting non-atomic budget checks and millisatoshi truncation. Attackers can send concurrent pay_invoice requests that pass budget_allows_spend() before add_to_budget() runs, or repeatedly pay msat amounts that are floored to whole satoshis, to drain funds beyond the limit.","severity":"critical","score":9.3,"published":"2026-10-27T13:09:52.728Z","modified":"2026-10-27T13:09:52.728Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://github.com/spesmilo/electrum/security/advisories/GHSA-q7m2-785w-r585","https://github.com/spesmilo/electrum/commit/5222374046d2a92da371d46c79ce0e61e7e2a42d","https://github.com/spesmilo/electrum/commit/3956bff0684f6060fbe8c823c3ee921928cdcaa5","https://www.vulncheck.com/advisories/electrum-before-4.7.2-nostr-wallet-connect-plugin-daily-spending-limit-bypass"],"sources":[{"name":"CVE","id":"CVE-2026-117603","modified":"2026-10-27T13:09:52.728Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-117603"}],"assessments":[{"source":"CNA","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.3},{"source":"CNA","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3}]}