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.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-117603 ↗
- github.com/spesmilo/electrum/commit/3956bff0684f6060fbe8c823c3ee921928cdcaa5 ↗
- github.com/spesmilo/electrum/commit/5222374046d2a92da371d46c79ce0e61e7e2a42d ↗
- github.com/spesmilo/electrum/security/advisories/GHSA-q7m2-785w-r585 ↗
- www.vulncheck.com/advisories/electrum-before-4.7.2-nostr-wallet-connect-plugin-daily-spending-limit-bypass ↗
Related CVEs
← CVE Index: search every CVE from the last 30 days
This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.