Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/klever-io/klever-go/commit/063bb3ed98f9a84a4b1f7286680613a5fc
- https://github.com/klever-io/klever-go/pull/16
- https://github.com/klever-io/klever-go/releases/tag/v1.7.20
- https://github.com/klever-io/klever-go/security/advisories/GHSA-26r5-4mm2-px5c
- https://github.com/klever-io/klever-go/security/advisories/GHSA-26r5-4mm2-px5c
FAQ
What is CVE-2026-82406?
CVE-2026-82406 is a documented vulnerability. 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...
How severe is CVE-2026-82406?
CVSS scoring is not yet available for CVE-2026-82406. Check NVD for updates.
Is there a patch for CVE-2026-82406?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.