7.5Alta
CVE-2026-117601Electrum before 4.8.3 Missing Signature Verification of Mempool Transactions
Descripción
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. Attackers can swallow the user's transaction and display an invalid zero-fee copy paying an attacker address, tricking users into RBF fee-bumping and signing it.
Debilidad (CWE):
CWE-347
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
Referencias y parches
- GitHub Security Advisory (GHSA-6jp4-8v48-cc5v) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: Electrum before 4.8.3 Missing Signature Verification of Mempool Transactions third-party-advisory