CVE-2026-54755 json
Klever-Go: Integer overflow in split-royalty validation enables unbounded minting of KLV (native token)
published 2026-08-28 2 mo ago modified 2026-09-09 1 mo ago also GHSA-cgc5-v3f2-8m2v , GO-2026-6310 , EUVD-2026-67825
- cvss
- 9.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/klever-io/klever-go 1.7.19
- govulncheck-vulndb SLES 16.0, SLES for SAP applications 16.0 0.0.20260902T191204-160000.1.1
suse advisories SUSE-SU-2026:23692-1SUSE-SU-2026:23712-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260902T191204-160000.1.1
opensuse advisories openSUSE-SU-2026:21812-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H |
| GitHub | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/klever-io/klever-go | <1.7.19 |
1.7.19 |
Affected products
- klever-io klever-go
Classification
- Weakness
-
- CWE-190 Integer Overflow or Wraparound
References
Sources
- CVE List CVE-2026-54755
- GitHub Advisory GHSA-cgc5-v3f2-8m2v
- NVD CVE-2026-54755
- OSV GO-2026-6310
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