CVE-2026-40583 Details
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.
A critical vulnerability exists in UltraDAG version 0.1, where a non-council attacker can exploit the SmartOp::Vote transaction. The issue arises because the transaction bypasses initial authorization checks, leading to unauthorized actions that disrupt the blockchain's supply integrity. This vulnerability allows attackers to manipulate governance processes, causing significant disruptions in network operations.
Users are advised to upgrade to the patched version of UltraDAG, which is available on the UltraDAG GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 21, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp | CISA-ADP | ExploitMitigationVendor Advisory |
| https://github.com/UltraDAGcom/core/commit/2f5a3a237ea519b48d71e6e3093c89f60694c7be | [email protected] | Patch |
| https://github.com/UltraDAGcom/core/commit/45bcf7064741897319b6196d3d9f9e1307093511 | [email protected] | Patch |
| https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-460 | Improper Cleanup on Thrown Exception | [email protected] |
| CWE-696 | Incorrect Behavior Order | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ultradag ultradag | 0.1.0 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 27, 2026 | Initial Analysis | [email protected] |
| Apr 21, 2026 | CVE Modified | CISA-ADP |
| Apr 21, 2026 | New CVE Received | [email protected] |