CVE-2026-40583

HIGH

UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt

Title source: cna
STIX 2.1

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.

Scores

CVSS v3 8.2
EPSS 0.0038
EPSS Percentile 29.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-460 CWE-696
Status published
Products (2)
ultradag/ultradag 0.1.0
UltraDAGcom/core = 0.1
Published Apr 21, 2026
Tracked Since Apr 21, 2026