CVE-2026-54755
CriticalCVSS 9.6Summary
Klever-Go before version 1.7.19 has a vulnerability in decoding split-royalty fields that can contain values greater than core.HundredPercent, and summing in uint32 accumulators can wrap the validation sum to zero and bypass checks. Royalty payout paths credit each oversized split amount and silently discard a negative remainder, allowing ordinary transfers to create unbacked KLV or other assets. This issue is fixed in version 1.7.19.
Risk Assessment
An attacker can create unbacked assets, leading to token supply integrity compromise and potential financial losses.
Recommendation
Upgrade Klever-Go to version 1.7.19 and audit transactions for anomalies in royalty payouts.
Original NVD description (English source)
Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.19, split-royalty fields decoded in core/kapp/builtInFunctions/utils.go can contain values greater than core.HundredPercent, and core/kapp/kda/create.go and core/kapp/kda/trigger.go sum those values in uint32 accumulators. Crafted values such as two 0x80000000 entries wrap the validation sum to zero and pass CheckValid100Params. Royalty payout paths in core/kapp/accounts/accounts.go, core/kapp/market/market.go, and core/kapp/ito/ito.go then credit each oversized split amount and silently discard a negative remainder, allowing ordinary asset transfers, marketplace purchases, or ITO purchases to create unbacked KLV or other assets. This issue is fixed in version 1.7.19.