CVE-2026-55764

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.19, Klever-Go allows a mint-role holder to bypass a finite per-nonce MaxSupply on the semi-fungible token add-quantity path. In core/kapp/systemAccount/systemAcount.go, SFTAddCirculation performed meta.Circulation += amount before evaluating whether Circulation exceeded MaxSupply, without checking for signed int64 overflow. A large positive raw Amount supplied through processSemiFungibleAddQuantity in core/kapp/kda/mint.go can wrap Circulation negative, causing the signed maximum-supply comparison to pass and crediting approximately MaxInt64 units while corrupting the on-chain counter. The fungible path is not affected because its MintedValue <= 0 guard detects the overflow. The correction uses the consensus activation flag FixMarketBuyOverflow. This issue is fixed in version 1.7.19.

CVSS

No CVSS.

References

Link	Resource
https://github.com/klever-io/klever-go/commit/8bcc600b0ac88070740c63c7ce1c8a968dd85251
https://github.com/klever-io/klever-go/releases/tag/v1.7.19
https://github.com/klever-io/klever-go/security/advisories/GHSA-mrpp-v6pg-p54x
https://github.com/klever-io/klever-go/security/advisories/GHSA-mrpp-v6pg-p54x

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-28 23:17

Updated : 2026-09-09 21:09

NVD link : CVE-2026-55764

Mitre link : CVE-2026-55764

CVE.ORG link : CVE-2026-55764

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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