CVE-2026-82406

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

• https://github.com/klever-io/klever-go/commit/063bb3ed98f9a84a4b1f7286680613a5fc3c91b2 security-advisories@github.com
• https://github.com/klever-io/klever-go/pull/16 security-advisories@github.com
• https://github.com/klever-io/klever-go/releases/tag/v1.7.20 security-advisories@github.com
• https://github.com/klever-io/klever-go/security/advisories/GHSA-26r5-4mm2-px5c security-advisories@github.com

The full cvelistV5 record. Download as CVE-2026-82406.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "klever-go",
          "vendor": "klever-io",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.7.20"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the native marketplace function core/kapp/market/market.go Buy does not check IsClaimed before accepting a bid. A seller can use the Claim seller-accept branch to settle a resting-bid auction while leaving the claimed order loadable with a future EndTime and stale CurrentBid and CurrentBidder values. A later bidder can submit a higher bid, be debited, and cause the previous bidder to receive a refund even though the NFT has already been delivered. Because Claim and CancelOrder reject the later bidder when IsClaimed is true, the later bidder cannot obtain the NFT or recover the funds. This issue is fixed in version 1.7.20."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-841",
              "description": "CWE-841: Improper Enforcement of Behavioral Workflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-23T19:10:23.367Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/klever-io/klever-go/security/advisories/GHSA-26r5-4mm2-px5c",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/klever-io/klever-go/security/advisories/GHSA-26r5-4mm2-px5c"
        },
        {
          "name": "https://github.com/klever-io/klever-go/pull/16",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/klever-io/klever-go/pull/16"
        },
        {
          "name": "https://github.com/klever-io/klever-go/commit/063bb3ed98f9a84a4b1f7286680613a5fc3c91b2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/klever-io/klever-go/commit/063bb3ed98f9a84a4b1f7286680613a5fc3c91b2"
        },
        {
          "name": "https://github.com/klever-io/klever-go/releases/tag/v1.7.20",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/klever-io/klever-go/releases/tag/v1.7.20"
        }
      ],
      "source": {
        "advisory": "GHSA-26r5-4mm2-px5c",
        "discovery": "UNKNOWN"
      },
      "title": "Klever-Go: Zombie-order theft: `Buy` missing `IsClaimed` guard in native marketplace"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-82406",
    "datePublished": "2026-09-23T19:10:23.367Z",
    "dateReserved": "2026-08-28T22:00:43.513Z",
    "dateUpdated": "2026-09-23T19:10:23.367Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}