CVE-2026-54754

CRITICAL 9.6

Klever-Go: Marketplace settlement mints KLV when referral % + royalty % exceed the bid (negative seller share silently skipped)

CVSS Score

9.6

EPSS Score

0.0%

EPSS Percentile

0th

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.19, marketplace settlement in core/kapp/market/market.go reads MarketOrderData.ReferralPercentage from the listing while reading asset.Royalties.MarketPercentage live at purchase time. An asset owner can create a valid listing and then use AssetTrigger UpdateRoyalties to make the combined referral and royalty percentages exceed the bid. executeBuyMarket pays referral and royalty amounts unconditionally while computeMarketOwnerAmount silently skips a nonpositive seller remainder, allowing MarketBuy, BuyItNow, or auction Claim settlement to credit more KLV or sale currency than the buyer paid. This can create unbacked currency and corrupt token supply integrity. This issue is fixed in version 1.7.19.

CWE	CWE-191 CWE-367 CWE-682
Vendor	klever-io
Product	klever-go
Published	Aug 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

High

Affected Versions

klever-io / klever-go

< 1.7.19

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/klever-io/klever-go/security/advisories/GHSA-p7gw-2pcp-5pf8 github.com: https://github.com/klever-io/klever-go/commit/8bcc600b0ac88070740c63c7ce1c8a968dd85251 github.com: https://github.com/klever-io/klever-go/releases/tag/v1.7.19