CVE-2026-40583

UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt

State: Published
Severity: 8.8 High
Published: Apr 21, 2026
Updated: Apr 21, 2026
Reserved: Apr 14, 2026

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	Score	Vector	Source
4.0	8.8 High	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	GitHub_M

Weaknesses

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

Affected Products

Product	Versions
coreUltraDAGcom	= 0.1Affected

References

https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp
https://github.com/UltraDAGcom/core/commit/2f5a3a237ea519b48d71e6e3093c89f60694c7be
https://github.com/UltraDAGcom/core/commit/45bcf7064741897319b6196d3d9f9e1307093511

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.