{"id":"EUVD-2026-85648","revision":"b4a424d00dcd425ea78cfb01d811c1b2","records":[{"revision":"b4a424d00dcd425ea78cfb01d811c1b2","observedAt":"2026-10-28T09:45:21.11+00:00","statement":{"source":"euvd","id":"EUVD-2026-85648","aliases":["CVE-2026-82405","GHSA-97cv-x867-6xhm"],"title":"Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the KleverUpdateAccountPermission built-in authorizes replacement of a target account's permissions by checking attacker-controlled vmInput.RecipientAddr…","description":"Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the KleverUpdateAccountPermission built-in authorizes replacement of a target account's permissions by checking attacker-controlled vmInput.RecipientAddr instead of authenticated vmInput.CallerAddr. An attacker-controlled contract can choose a victim account with configured permissions as RecipientAddr, and contractHasValidPermission can accept the victim's default self-signer as authorization. UpdatePermission can then replace the victim's entire permission set with attacker-supplied Owner permissions, enabling asset theft or permanent lockout without a victim key or signature. Accounts without stored permissions and the native transaction path are not affected. This issue is fixed in version 1.7.20.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":null}],"references":["https://github.com/klever-io/klever-go/security/advisories/GHSA-97cv-x867-6xhm","https://github.com/klever-io/klever-go/commit/c58740eb74d7ee8f07db1e18a7d6214b5559ba32","https://gist.github.com/mabdullah22/a41f90aa5ba86bbebf121f739bd5f5e9","https://github.com/klever-io/klever-go/releases/tag/v1.7.20"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-85648","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 23, 2026, 7:26:12 PM","dateUpdated":"Sep 24, 2026, 3:05:37 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-85648","identifiers":["EUVD-2026-85648","CVE-2026-82405","GHSA-97cv-x867-6xhm"]},"retained":false,"historicalAffected":[]}],"coverage":[]}