{"id":"CVE-2026-106511","title":"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 wi…","summary":"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 wi…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-306","CWE-862","CWE-863"],"vendor":"MultiversX Labs S.R.L.","product":"multisig-improved","affected":["multisig-improved GitHub commit 2e6dbea40f9b8ac165572a9efd4304804762a299"],"published":"2026-10-06","updated":"2026-10-07","sourceUpdated":"2026-10-07T18:17:16.800","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106511","references":[{"url":"https://gist.github.com/x01griax/c03f4be898dc55ccf3bab667c83c7312","label":"cret@cert.org"},{"url":"https://github.com/multiversx/mx-multisig-and-modules","label":"cret@cert.org"},{"url":"https://gist.github.com/x01griax/c03f4be898dc55ccf3bab667c83c7312","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-07T17:53:21.355591Z"},"epss":0.00468,"epssPercentile":0.40309,"ingestedAt":"2026-10-06T19:13:33.852Z","slug":"CVE-2026-106511","body":"## Overview\n\nMultiversX'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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":217651,"id":"CVE-2026-106511","ts":1791398590291,"field":"exploit_available","old":"false","new":"true"},{"seq":217650,"id":"CVE-2026-106511","ts":1791398590291,"field":"cvss","old":null,"new":"9.8"},{"seq":217649,"id":"CVE-2026-106511","ts":1791398590291,"field":"severity","old":"none","new":"critical"}]}