How severe is CVE-2026-40583?

CVE-2026-40583 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2026-40583 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40583?

CVE-2026-40583 affects Ultradag. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40583?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40583 have an EU (EUVD) identifier?

Yes. CVE-2026-40583 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24179.

When was CVE-2026-40583 published?

CVE-2026-40583 was published on 2026-04-21 and last updated on 2026-06-17.

CVE-2026-40583

CVE-2026-40583 is a high-severity vulnerability in Ultradag with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-460.

Key facts

Severity: High (CVSS 3.x base score 8.2)
CVSS v4: 8.8
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24179
Weakness: CWE-460
Affected product: Ultradag
Published: 2026-04-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-40583?: CVE-2026-40583 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2026-40583 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40583?: CVE-2026-40583 affects Ultradag. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40583?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40583 have an EU (EUVD) identifier?: Yes. CVE-2026-40583 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24179.
When was CVE-2026-40583 published?: CVE-2026-40583 was published on 2026-04-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ultradag:ultradag:0.1.0:*:*:*:*:*:*:*

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