CVE-2026-40583 PUBLISHED

UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt

Assigner: GitHub_M
Reserved: 14.04.2026 Published: 21.04.2026 Updated: 21.04.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/U:Red
CVSS Score: 8.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	UltraDAGcom
Product	core
Versions	Version = 0.1 is affected

References

Problem Types

CWE-460: Improper Cleanup on Thrown Exception CWE
CWE-696: Incorrect Behavior Order CWE