electrum: Electrum before 4.7.2 contains a spending limit bypass vulnerability in the Nostr Wallet Connect plugin that allows m...
CVE-2026-117603 is fixed in electrum on 1 platform by DEBIAN-CVE-2026-117603 (version 4.8.1+dfsg-1), released October 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| electrum · Debian 14 | 4.8.1+dfsg-1 | DEBIAN-CVE-2026-117603 | Oct 28, 2026 |
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