CVE-2026-82405

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.

CVSS

No CVSS.

References

Link	Resource
https://gist.github.com/mabdullah22/a41f90aa5ba86bbebf121f739bd5f5e9
https://github.com/klever-io/klever-go/commit/c58740eb74d7ee8f07db1e18a7d6214b5559ba32
https://github.com/klever-io/klever-go/releases/tag/v1.7.20
https://github.com/klever-io/klever-go/security/advisories/GHSA-97cv-x867-6xhm

Configurations

No configuration.

History

23 Sep 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-23 20:17

Updated : 2026-09-24 16:17

NVD link : CVE-2026-82405

Mitre link : CVE-2026-82405

CVE.ORG link : CVE-2026-82405

JSON object : View

Products Affected

No product.

CWE

CWE-863

Incorrect Authorization

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