UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt

{
  "id": "99ca4c4bff7411213097202ac2111796a46e9443bc52750465ad9a5a24d069e4",
  "url": "https://osv.dev/vulnerability/CVE-2026-40583",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt",
    "summary": "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.",
    "evidence": "osv:CVE-2026-40583",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-40583",
      "aliases": [
        "CVE-2026-40583",
        "GHSA-q8wx-2crx-c7pp"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ultradagcom/core",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3b0589a20bc3afebed861f664ceb6167a6785770"
                },
                {
                  "fixed": "2f5a3a237ea519b48d71e6e3093c89f60694c7be"
                },
                {
                  "fixed": "45bcf7064741897319b6196d3d9f9e1307093511"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "= 0.1"
                      },
                      {
                        "last_affected": "= 0.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2f5a3a237ea519b48d71e6e3093c89f60694c7be"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "45bcf7064741897319b6196d3d9f9e1307093511"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.1.0",
            "= 0.1",
            "latest",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40583.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.081829822Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40583.json",
        "https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-40583",
        "https://github.com/UltraDAGcom/core/commit/2f5a3a237ea519b48d71e6e3093c89f60694c7be",
        "https://github.com/UltraDAGcom/core/commit/45bcf7064741897319b6196d3d9f9e1307093511"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-460",
          "CWE-696"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40583.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-40583",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509920,
  "published_at": "2026-04-21T16:57:42.1+00:00"
}