CVE-2026-54755Critical· 9.6▾ Midnight

Klever-Go is the Go implementation of the Klever blockchain protocol

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score53/ 100 · Moderate

impact 52.8 · likelihood 0.1 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

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Published

Aug 28, 2026

Updated

Sep 9, 2026

CVSS

9.6

Vendor

klever-io

Product

github.com/klever-io/klever-go

CWE

CWE-190

Depth score

53 · Moderate

EPSS

0.39% · p33

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

EPSS history

Exploit-prediction probability, daily snapshots since Aug 29.

0.4% → 0.4%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 12 days

Aug 28, 2026Published
Disclosed via NVD
Aug 29, 2026EPSS first tracked
0.4%
Sep 9, 2026Record revised
Last analysed / modified upstream

klever-io CWE-190 #nvd #ghsa #go

Affected

github.com/klever-io/klever-go < 1.7.19

Patched in

github.com/klever-io/klever-go 1.7.19

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

Package advisory (CVE-2026-54755)

Affected packages:

github.com/klever-io/klever-go < 1.7.19

Patched in:

github.com/klever-io/klever-go 1.7.19

Source: https://github.com/advisories/GHSA-cgc5-v3f2-8m2v

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#ghsa#go

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