Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/klever-io/klever-go/commit/8bcc600b0ac88070740c63c7ce1c8a968d
- 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
FAQ
What is CVE-2026-55764?
CVE-2026-55764 is a documented vulnerability. 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-quantit...
How severe is CVE-2026-55764?
CVSS scoring is not yet available for CVE-2026-55764. Check NVD for updates.
Is there a patch for CVE-2026-55764?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.