Electrum before 4.8.3 fails to verify signatures of wallet-owned inputs in unconfirmed mempool transactions, allowing malicious servers to replace a just-broadcast transaction with a conflicting one.
CVSS 4.0CRITICAL 9.3·Network·No auth·No interaction·EPSS 0.00176·Published 2026-10-27·Fixed in 4.8.3CWE-347
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…
CVSS 4.0CRITICAL 9.3·Network·No auth·No interaction·EPSS 0.00194·Published 2026-10-27·Fixed in 4.7.2CWE-367
Electrum 4.6.0 before 4.7.2 contains an authorization bypass in the external plugin loader, which executes a plugin's __init__.py module when the plugin is marked enabled in the config file, without verifying its plugin-…
CVSS 4.0HIGH 8.6·Local·No auth·No interaction·EPSS 0.0011·Published 2026-10-27·Fixed in 4.7.2CWE-347