CVE-2026-40583
UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt
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.
INFO
Published Date :
April 21, 2026, 5:16 p.m.
Last Modified :
April 27, 2026, 3:23 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update UltraDAG to perform authorization before state changes.
- Review all transaction processing logic for similar race conditions.
- Test transaction validation thoroughly in all states.
Public PoC/Exploit Available at Github
CVE-2026-40583 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40583.
| URL | Resource |
|---|---|
| https://github.com/UltraDAGcom/core/commit/2f5a3a237ea519b48d71e6e3093c89f60694c7be | Patch |
| https://github.com/UltraDAGcom/core/commit/45bcf7064741897319b6196d3d9f9e1307093511 | Patch |
| https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp | Exploit Mitigation Vendor Advisory |
| https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40583 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40583
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40583 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40583 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H Added CPE Configuration OR *cpe:2.3:a:ultradag:ultradag:0.1.0:*:*:*:*:*:*:* Added Reference Type GitHub, Inc.: https://github.com/UltraDAGcom/core/commit/2f5a3a237ea519b48d71e6e3093c89f60694c7be Types: Patch Added Reference Type GitHub, Inc.: https://github.com/UltraDAGcom/core/commit/45bcf7064741897319b6196d3d9f9e1307093511 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp Types: Exploit, Mitigation, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 21, 2026
Action Type Old Value New Value Added Reference https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp -
New CVE Received by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Red Added CWE CWE-460 Added CWE CWE-696 Added Reference https://github.com/UltraDAGcom/core/commit/2f5a3a237ea519b48d71e6e3093c89f60694c7be Added Reference https://github.com/UltraDAGcom/core/commit/45bcf7064741897319b6196d3d9f9e1307093511 Added Reference https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp