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    CVE-2026-40583

    UltraDAG is a minimal DAG-BFT blockchain in Rust. In version 0.1, a non-council attacker can submit a signed SmartOp::Vote transaction that passes signature, nonce, and balance prechecks, but fails authorization only after state mutation has already occurred.

    Published:Apr 21, 2026
    Last Modified:Apr 27, 2026
    EPS:Apr 21, 2026
    EPSS Score:0.00052
    CVSS Score:8.2

    Affected Products

    Vendor
    Ultradag
    Product
    Ultradag
    Vendor
    Ultradagcom
    Product
    Core

    Exploits

    https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pphttps://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High