What is CVE-2026-40583?

CVE-2026-40583 is a high-severity vulnerability in Ultradag, classified under CWE-460. CVSS score: 8.2/10. Published 2026-04-21.

How severe is CVE-2026-40583?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Ultradag

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 h…

EPSS: 0.004 (29.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Ultradag — versions 0.1.0
Ultradagcom Core — versions = 0.1

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-40583?: CVE-2026-40583 is a high-severity vulnerability in Ultradag, classified under CWE-460. CVSS score: 8.2/10. Published 2026-04-21.
How severe is CVE-2026-40583?: High severity. CVSS v3 base score is 8.2 out of 10.