CVE-2026-54754Known exploitationPublic exploitNetwork attack vectorHinoki check available

Currency minting via stale royalty validation

Published Aug 28, 2026 · Updated Aug 28, 2026

Incorrect marketplace settlement in Klever klever-go before 1.7.19 allows remote authenticated users to mint unbacked sale currency. Settlement combines a referral percentage saved at listing time with a mutable royalty percentage read at purchase, then pays both while silently dropping a negative seller remainder. Any funded account can create the required collection and marketplace; repeated signed transactions corrupt token-supply integrity and enabled observed financial theft.

CVSS severity9.6
Critical
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Incorrect marketplace settlement in Klever klever-go before 1.7.19 allows remote authenticated users to mint unbacked sale currency. Settlement combines a referral percentage saved at listing time with a mutable royalty percentage read at purchase, then pays both while silently dropping a negative seller remainder. Any funded account can create the required collection and marketplace; repeated signed transactions corrupt token-supply integrity and enabled observed financial theft.

The record

CVE
CVE-2026-54754
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
Klever
Product
klever-go
Classifications
CWE-191, CWE-367, CWE-682, T1657
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2026Exploitation reportedKlever mainnet marketplace inflation exploitation
  2. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  3. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.7.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Klever · klever-goversion=< 1.7.19

Published CVSS scores

9.6GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-682Incorrect Calculation
T1657Financial Theft

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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