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CVE-2026-55763— Klever-Go: Percentage-transfer royalty skips the source debit at exactly-100% splits

Quick assessment

Affected
klever-io klever-go
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Klever是Klever组织的一个高性能区块链网络，专为去中心化应用、资产管理和智能合约执行而设计。 Klever 1.7.19之前版本存在处理逻辑错误漏洞，该漏洞源于processPercentageRoyaltiesTransfer在拆分循环和提前返回后才调用SubFromBalance，导致源账户未被借记且供应计数器未更新，可能允许无限制的账外增发KDA。

CVSS 8.7 · High EPSS 0.51% · P42

Possible ATT&CK Techniques 1 AI

T1069 · Permission Groups Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
klever-io klever-go < 1.7.19 affected
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I. Basic Information for CVE-2026-55763

Vulnerability Information
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Vulnerability Title
Klever-Go: Percentage-transfer royalty skips the source debit at exactly-100% splits
Source: CVE Program / CVE List V5
Vulnerability Description
Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.19, processPercentageRoyaltiesTransfer in core/kapp/accounts/accounts.go calls SubFromBalance after the split loop and after the royaltiesToPay <= 0 early return. computeSplitRoyalties rejects only when splitToPay > royaltiesToPay, so a valid PercentTransferPercentage = 10000 split consumes exactly 100 percent of the royalty pool, sets royaltiesToPay to zero, and returns before the source account is debited. The split recipient receives the full royaltyAmount while the sender pays nothing and the supply counter is not updated, allowing unbounded off-the-books inflation of the transferred KDA. A KDA owner must configure a TransferPercentage royalty with a 100 percent split, after which any holder's transfer of the asset triggers the mint; the sibling processFixedRoyaltiesTransfer path is not affected because it debits the source before distribution. This issue is fixed in version 1.7.19.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
行为工作流的不恰当实施
Source: CVE Program / CVE List V5
Vulnerability Title
Klever 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Klever是Klever组织的一个高性能区块链网络，专为去中心化应用、资产管理和智能合约执行而设计。 Klever 1.7.19之前版本存在处理逻辑错误漏洞，该漏洞源于processPercentageRoyaltiesTransfer在拆分循环和提前返回后才调用SubFromBalance，导致源账户未被借记且供应计数器未更新，可能允许无限制的账外增发KDA。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
klever-io klever-go < 1.7.19 -

II. Public POCs for CVE-2026-55763

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III. Intelligence Information for CVE-2026-55763

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Vendor Advisories for CVE-2026-55763 (1)

Vendor Pages for CVE-2026-55763 (1)

Same Patch Batch · klever-io · 2026-08-28 · 4 CVEs total

CVE-2026-54754 9.6 CRITICAL Klever-Go: Marketplace settlement mints KLV when referral % + royalty % exceed the bid (ne
CVE-2026-54755 9.6 CRITICAL Klever-Go: Integer overflow in split-royalty validation enables unbounded minting of KLV (
CVE-2026-55764 8.7 HIGH Klever-Go: SFT add-quantity `int64` overflow bypasses a finite per-nonce MaxSupply

IV. Related Vulnerabilities

Same product: klever-go
Same vendor: klever-io
Same weakness: CWE-841

V. Comments for CVE-2026-55763

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