{"schemaVersion":3,"id":"CVE-2026-54755","aliases":["GHSA-cgc5-v3f2-8m2v","GO-2026-6310"],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2026-08-28T16:23:44.276Z","modified":"2026-08-31T18:54:33.603Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.6,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":9.6,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Go","score":9.6,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","exploitability":7.9,"impact":9.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.6,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0056,"percentile":0.45789,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.174,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00386},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0056,"percentile":0.45789}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00386,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0056,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0056,"percentile":0.45789}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-190","name":"Integer Overflow or Wraparound","description":"The product performs a calculation that can\n         produce an integer overflow or wraparound when the logic\n         assumes that the resulting value will always be larger than\n         the original value. This occurs when an integer value is\n         incremented to a value that is too large to store in the\n         associated representation. When this occurs, the value may\n         become a very small or negative number.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/190.html"}],"affected":[{"vendor":"github.com/klever-io","product":"klever-go","name":"github.com/klever-io/klever-go","label":"klever-go","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/klever-io/klever-go","purlType":"golang","versions":[{"text":"< 1.7.19","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.7.19","eol":null,"hubHref":null},{"vendor":"klever-io","product":"klever-go","name":"klever-go","label":"klever-go","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.7.19","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.7.19","eol":null,"hubHref":"/vendor/klever-io/klever-go"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/klever-io/klever-go/security/advisories/GHSA-cgc5-v3f2-8m2v","label":"github.com/klever-io/klever-go/security/advisories/GHSA-cgc5-v3f2-8m2v","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","Advisory"]},{"url":"https://github.com/klever-io/klever-go/commit/8bcc600b0ac88070740c63c7ce1c8a968dd85251","label":"github.com/klever-io/klever-go/commit/8bcc600b0ac88070740c63c7ce1c8a968dd85251","hostname":"github.com","tags":["X Refsource MISC","WEB","FIX"]},{"url":"https://github.com/klever-io/klever-go/releases/tag/v1.7.19","label":"github.com/klever-io/klever-go/releases/tag/v1.7.19","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/klever-io/klever-go","label":"github.com/klever-io/klever-go","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:21812-1","SUSE-SU-2026:23692-1","SUSE-SU-2026:23712-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:21812-1","SUSE-SU-2026:23692-1","SUSE-SU-2026:23712-1"]},"timeline":[{"kind":"published","date":"2026-08-28T16:23:44.276Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-31T18:54:33.603Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T05:26:40.586Z","stale":false,"partial":false}}