CVE-2026-106511: CVE-2026-106511

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-06 · updated 2026-10-07
Weakness: CWE-306

Description

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: GitHub commit 2e6dbea40f9b8ac165572a9efd4304804762a299

References

https://gist.github.com/x01griax/c03f4be898dc55ccf3bab667c83c7312
https://github.com/multiversx/mx-multisig-and-modules
https://gist.github.com/x01griax/c03f4be898dc55ccf3bab667c83c7312

Get alerted when CVE-2026-106511 or the next vulnerability affects your stack