{"id":"CVE-2026-106511","published":"2026-10-06T19:18:13.500","lastModified":"2026-10-07T18:17:16.800","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.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-306","CWE-862","CWE-863"],"vendors":[],"products":[],"references":[{"url":"https://gist.github.com/x01griax/c03f4be898dc55ccf3bab667c83c7312","tags":[]},{"url":"https://github.com/multiversx/mx-multisig-and-modules","tags":[]},{"url":"https://gist.github.com/x01griax/c03f4be898dc55ccf3bab667c83c7312","tags":[]}],"exploitRefs":[{"url":"https://gist.github.com/x01griax/c03f4be898dc55ccf3bab667c83c7312","tags":[]},{"url":"https://github.com/multiversx/mx-multisig-and-modules","tags":[]},{"url":"https://gist.github.com/x01griax/c03f4be898dc55ccf3bab667c83c7312","tags":[]}],"hasPoc":true,"ai":{"summary":"The vulnerability allows any account with the Proposer role to perform explicitly barred actions, draining the contract's balance in two transactions with zero signatures.","exploitability":"Exploitation is relatively straightforward given the preconditions of having the Proposer role and the ability to execute two transactions without signatures.","blast_radius":"If exploited, the vulnerability could result in the complete draining of the contract's EGLD/ESDT balance, leading to significant financial loss.","remediation":"Upgrade to the fixed version 1.2.3 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","finance","smart-contract"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-08T08:40:38.298Z"}}