{"id":"CVE-2026-82405","revision":"d69c08caa52e4e50b93f0f17b0735b42","records":[{"revision":"d69c08caa52e4e50b93f0f17b0735b42","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-82405","aliases":[],"title":"Klever-Go Account takeover: `kleverUpdateAccountPermission` authorizes on attacker-controlled `RecipientAddr` instead of the authenticated caller","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":"2026-09-23T19:26:12.967+00:00","modifiedAt":"2026-09-24T15:05:37.458+00:00","affected":[{"ecosystem":"Vendor product","name":"klever-go","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"klever-io\",\n                    \"product\": \"klever-go\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.7.20\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"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":"HIGH"}],"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://www.cve.org/CVERecord?id=CVE-2026-82405","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-82405","identifiers":["CVE-2026-82405"]},"retained":false,"historicalAffected":[]}],"coverage":[]}