CVE-2026-82406

UNKNOWN 0.0

Klever-Go: Zombie-order theft: `Buy` missing `IsClaimed` guard in native marketplace

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-841
Vendor	klever-io
Product	klever-go
Published	Sep 23, 2026

Stay Ahead of the Next One

Get instant alerts for klever-io klever-go

Be the first to know when new unknown vulnerabilities affecting klever-io klever-go are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

klever-io / klever-go

< 1.7.20

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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