{"id":"CVE-2026-117603","aliases":["DEBIAN-CVE-2026-117603","EUVD-2026-110852","GHSA-98mp-7r7x-725c","GHSA-q7m2-785w-r585"],"status":"published","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":{"version":"4.0","score":9.3,"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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00194,"percentile":0.09211,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-367"],"published":"2026-10-27T13:09:52Z","modified":"2026-11-04T02:30:48Z","fixes":[{"ecosystem":"Debian:14","package":"electrum","fixed_in":["4.8.1+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:14","package":"electrum","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.8.1+dfsg-1"}]}],"versions":["4.5.8+ds-6","4.5.8+ds-7","4.5.8+ds-8","4.6.2+dfsg-1","4.6.2+dfsg-2","4.6.2+dfsg-2~bpo13+1","4.7.0+dfsg-1","4.7.0+dfsg-1~bpo13+1","4.7.0+dfsg2-1","4.7.1+dfsg-1","4.7.2+dfsg-1","4.7.2+dfsg-1~bpo13+1","4.7.2+dfsg-2","4.8.1+dfsg-1~bpo13+1"]}],"products":[{"vendor":"spesmilo","product":"electrum"}],"references":[{"url":"https://github.com/spesmilo/electrum/security/advisories/GHSA-q7m2-785w-r585","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/spesmilo/electrum/commit/5222374046d2a92da371d46c79ce0e61e7e2a42d","tags":["patch","fix"]},{"url":"https://github.com/spesmilo/electrum/commit/3956bff0684f6060fbe8c823c3ee921928cdcaa5","tags":["patch","fix"]},{"url":"https://www.vulncheck.com/advisories/electrum-before-4.7.2-nostr-wallet-connect-plugin-daily-spending-limit-bypass","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117603","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-98mp-7r7x-725c"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/117xxx/CVE-2026-117603.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-117603","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-117603","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.","status":"published","published":"2026-10-27T13:09:52.728Z","modified":"2026-11-02T16:01:22.924Z","cvss":[{"version":"4.0","score":9.3,"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","level":"critical","assessor":"cna"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T18:00:08.034842Z"}],"euvd":[{"id":"EUVD-2026-110852","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.","status":"published","published":"2026-10-27T13:09:52Z","modified":"2026-11-02T16:01:22Z","cvss":[{"version":"4.0","score":9.3,"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","level":"critical"}],"updated_at":"2026-11-03T05:08:40.251173Z"}],"ghsa":[{"id":"GHSA-98mp-7r7x-725c","title":"Electrum before 4.7.2 contains a spending limit bypass vulnerability in the Nostr Wallet Connect...","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.","status":"published","published":"2026-10-27T15:32:47Z","modified":"2026-10-27T15:32:58Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"},{"version":"4.0","score":9.3,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T15:14:30.115077Z"}],"nvd":[{"id":"CVE-2026-117603","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.","status":"published","published":"2026-10-27T14:16:40.233Z","modified":"2026-11-02T16:17:31.263Z","cvss":[{"version":"4.0","score":9.3,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T20:51:43.225438Z"}],"osv":[{"id":"CVE-2026-117603","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.","status":"published","published":"2026-10-27T13:09:52.728Z","modified":"2026-11-04T02:30:48.585423073Z","cvss":[{"version":"4.0","score":9.3,"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","level":"critical"}],"cwes":["CWE-367"],"updated_at":"2026-11-04T02:54:44.889498Z"},{"id":"DEBIAN-CVE-2026-117603","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.","status":"published","published":"2026-10-27T14:16:40.233Z","modified":"2026-11-03T10:00:39.897001099Z","cvss":[{"version":"4.0","score":9.3,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"}],"updated_at":"2026-11-03T10:27:58.933618Z"}]}}