Klever-Go: Integer overflow in split-royalty validation enables unbounded minting of KLV (native token)

{
  "id": "783c44b6cc823cd509235dc41d5221725ba45c0c6afeaa1907b230ed8c127d7a",
  "url": "https://osv.dev/vulnerability/CVE-2026-54755",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Klever-Go: Integer overflow in split-royalty validation enables unbounded minting of KLV (native token)",
    "summary": "Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.19, split-royalty fields decoded in core/kapp/builtInFunctions/utils.go can contain values greater than core.HundredPercent, and core/kapp/kda/create.go and core/kapp/kda/trigger.go sum those values in uint32 accumulators. Crafted values such as two 0x80000000 entries wrap the validation sum to zero and pass CheckValid100Params. Royalty payout paths in core/kapp/accounts/accounts.go, core/kapp/market/market.go, and core/kapp/ito/ito.go then credit each oversized split amount and silently discard a negative remainder, allowing ordinary asset transfers, marketplace purchases, or ITO purchases to create unbacked KLV or other assets. This issue is fixed in version 1.7.19.",
    "evidence": "osv:CVE-2026-54755",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-54755",
      "aliases": [
        "CVE-2026-54755",
        "GHSA-cgc5-v3f2-8m2v",
        "GO-2026-6310"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/klever-io/klever-go",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8bcc600b0ac88070740c63c7ce1c8a968dd85251"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.7.19"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8bcc600b0ac88070740c63c7ce1c8a968dd85251"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8bcc600b0ac88070740c63c7ce1c8a968dd85251"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.7.19"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.7.19"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.7.18",
            "v1.7.17",
            "v1.7.16",
            "v1.7.15",
            "v1.7.14"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54755.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.610096272Z",
      "provider": "osv",
      "references": [
        "https://github.com/klever-io/klever-go/releases/tag/v1.7.19",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54755.json",
        "https://github.com/klever-io/klever-go/security/advisories/GHSA-cgc5-v3f2-8m2v",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54755",
        "https://github.com/klever-io/klever-go/commit/8bcc600b0ac88070740c63c7ce1c8a968dd85251"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-190"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54755.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54755",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489144,
  "published_at": "2026-08-28T16:23:44.276+00:00"
}