by Kastro
Paper/Archive/CVE-2026-106511

CVE-2026-106511

MultiversX Labs S.R.L. multisig-improved — CVE-2026-106511

EPSS 0.5%public exploitCVSS 9.8
critical.is priorityof 100
48
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 40.4.404 × 208.1Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
multisig-improvedGitHub commit 2e6dbea40f9b8ac165572a9efd4304804762a299–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refgithub.com/multiversx/mx-multisig-and-modulesexploitgist.github.com/x01griax/c03f4be898dc55ccf3bab667c83c7312