{"id":"CVE-2026-117603","published":"2026-10-27T14:16:40.233","lastModified":"2026-10-27T16:03:45.247","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.","cvssScore":4.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","cwes":["CWE-367"],"vendors":[],"products":[],"references":[{"url":"https://github.com/spesmilo/electrum/commit/3956bff0684f6060fbe8c823c3ee921928cdcaa5","tags":[]},{"url":"https://github.com/spesmilo/electrum/commit/5222374046d2a92da371d46c79ce0e61e7e2a42d","tags":[]},{"url":"https://github.com/spesmilo/electrum/security/advisories/GHSA-q7m2-785w-r585","tags":[]},{"url":"https://www.vulncheck.com/advisories/electrum-before-4.7.2-nostr-wallet-connect-plugin-daily-spending-limit-bypass","tags":[]}],"exploitRefs":[{"url":"https://github.com/spesmilo/electrum/commit/3956bff0684f6060fbe8c823c3ee921928cdcaa5","tags":[]},{"url":"https://github.com/spesmilo/electrum/commit/5222374046d2a92da371d46c79ce0e61e7e2a42d","tags":[]},{"url":"https://github.com/spesmilo/electrum/security/advisories/GHSA-q7m2-785w-r585","tags":[]}],"hasPoc":true,"ai":null}