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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-Go 是 Klever 区块链协议的 Go 语言实现。在 1.7.19 之前， 中的 函数在拆分循环之后以及 提前返回之后才调用 。由于 仅在 时才拒绝处理，一个 （即 100%）的有效拆分会恰好消耗整个版税池的 100%，将 置为零，并在从源账户扣款之前就提前返回。结果，拆分的接收方收到了全额的 ，而发送方未支付任何费用，且供应量计数器未更新，从而导致被转移的 KDA 出现无限制的非账本内通胀。要触发此问题，KDA 持有者需配置一个包含 100% 拆分的 版税，此后任何持有者转移该资产即会触发铸造。

CVSS 8.7 · High

Possible ATT&CK Techniques 1 AI

T1069 · Permission Groups Discovery
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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

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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