CVE-2026-40583
UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt
8.2CVSSHIGH
Description
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.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:LIntegrityLow
A:HAvailabilityHigh
Weaknesses
Affected Products
Exploitability
Official Patch Available
Workaround Available
References
Timeline
Published
Apr 21, 2026
Last Updated
Apr 27, 2026
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