CVE-2026-40583CWE-460CWE-696

UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt

High · published April 21, 2026

CVSS v4.0
8.8
EPSS
0%
Percentile
30.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.8 · HIGH
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
EPSS
0.00376 · 30.8th percentile
Weaknesses
CWE-460 · Improper Cleanup on Thrown Exception; CWE-696 · Incorrect Behavior Order
Published
2026-04-21T16:57Z
EPSS history
Timeline
  • 21 APR 16:57Z
    UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt
    cvelistv5