CVE-2026-55764

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Source
https://cve.org/CVERecord?id=CVE-2026-55764
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55764.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55764
Aliases
Downstream
Related
Published
2026-08-28T22:08:27Z
Modified
2026-09-11T03:30:35Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Klever-Go: SFT add-quantity `int64` overflow bypasses a finite per-nonce MaxSupply
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55764.json"
}
References

Affected packages

Git / github.com/klever-io/klever-go

Affected ranges

Type
GIT
Repo
https://github.com/klever-io/klever-go
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8bcc600b0ac88070740c63c7ce1c8a968dd85251
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.7.19"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*
v1.7.14
v1.7.15
v1.7.16
v1.7.17
v1.7.18

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55764.json"