CVE-2026-117601
CVE-2026-117601 · Electrum before 4.8.3 Missing Signature Verification of Mempool Transactions
Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.
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.
CVSS 9.3 · Critique · Correctif disponible
- Publication
- Mise à jour
Produits et versions concernés
electrum
- Versions du logiciel
- ≥ 0, < 4.8.3: Concernée (semver)
- 4.8.3: Non concernée (semver)
Mettez à jour vers 4.8.3
Sources originales
- https://github.com/spesmilo/electrum/security/advisories/GHSA-6jp4-8v48-cc5v
- https://github.com/spesmilo/electrum/commit/90fe30822561e515a9d2d6e5a352cc07780999eb
- https://www.vulncheck.com/advisories/electrum-before-4.8.3-missing-signature-verification-of-mempool-transactions
- https://nvd.nist.gov/vuln/detail/CVE-2026-117601