CVE-2026-106511: Multiversx Labs S.r.l Multisig-Improved

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

MultiversX's multisig-improved (repository: mx-multisig-and-modules) reference implementation of their on-chain multisig smart contract system contains a vulnerability where a missing independent authorization check allows any account with the Proposer role to perform explicitly barred actions. This vulnerability allows the Proposer role to move funds alone, draining 100% of a contract's EGLD/ESDT balance in two transactions with zero signatures.

Affected products

• Multiversx Labs S.r.l Multisig-Improved

Published 2026-10-06. Last modified 2026-10-07.