VULNERABILITY INTELLIGENCE

CVE-2026-40583

CVSS score8.8 HIGH

EPSS probability0.38%

CISA KEVNot currently listed

Published2026-04-21

Last modified2026-10-26

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Red

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.

Weakness classification

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

Primary references

security-advisories@github.com — Patch
security-advisories@github.com — Patch
security-advisories@github.com — Exploit, Mitigation, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Mitigation, Vendor Advisory