High 8.8Published Apr 21, 2026

CVE-2026-40583UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt

Updated under an hour ago (Oct 26, 2026, 5:50 PM ET)

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It affects UltraDAGcom core and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for UltraDAGcom core

Exploited in the last 30 days

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: 8.8 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-460, CWE-696
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

UltraDAGcom core ultradagcom:core (from the name)	= 0.1	CNA record
ultradag ultradag ultradag:ultradag	0.1.0	NVD

References

References

https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/UltraDAGcom/core/commit/2f5a3a237ea519b48d71e6e3093c89f60694c7be	x-refsource-misc, patch
https://github.com/UltraDAGcom/core/commit/45bcf7064741897319b6196d3d9f9e1307093511	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.