CVE-2026-117603
Medium · 4.3CVSS
4.3
EPSS
0.2%
Published
Oct 27, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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