CVE-2026-40583 — HIGH (8.2)

Vulnerability 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 Score

8.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

HIGH

Affected Products

Vendor	Product	Versions
Ultradag	Ultradag	0.1.0

Related Weaknesses (CWE)

CWE-460 CWE-696

References

https://github.com/UltraDAGcom/core/commit/2f5a3a237ea519b48d71e6e3093c89f60694cPatch
https://github.com/UltraDAGcom/core/commit/45bcf7064741897319b6196d3d9f9e1307093Patch
https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7ppExploitMitigationVendor Advisory
https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7ppExploitMitigationVendor Advisory

FAQ

What is CVE-2026-40583?

CVE-2026-40583 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 au...

How severe is CVE-2026-40583?

CVE-2026-40583 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-40583?

Check the references section above for vendor advisories and patch information. Affected products include: Ultradag Ultradag.