CVE-2026-82406
HIGHDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v4 Vector
Exploitability
Impact
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploit Intelligence
Low risk: more likely to be exploited than 26% of all known CVEs.
References
Related Vulnerabilities
Other CWE-841 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-1667 | High | 7.5 | 1.3% | - | Fix |
| CVE-2023-4181 | Medium | 5.4 | 1.1% | - | - |
| CVE-2022-2105 | Critical | 9.4 | 1.1% | - | Fix |
| CVE-2026-67279 | Medium | 6.5 | 1.0% | KEV | Fix |
| CVE-2022-2102 | Critical | 9.4 | 0.9% | - | Fix |
| CVE-2026-43974 | High | 7.5 | 0.6% | - | Fix |
Common questions
How do I fix CVE-2026-82406?
No published fix for CVE-2026-82406 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-82406 being actively exploited?
Not that we know of. CVE-2026-82406 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.34% is the estimated probability that it will be exploited in the next 30 days. That is higher than 26% of all scored CVEs.
How severe is CVE-2026-82406?
CVE-2026-82406 has a CVSS v4 base score of 7.1, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-24.