CVE-2026-40583

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 4.0

8.8CVSS: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

CVSS 3.1

8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-26)

CWEs

CWE-460, CWE-696

Published

2026-04-21

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• ultradag:ultradag

References

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

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