CVE-2026-46403

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.17, KVM exposes ExecuteReadOnlyWithTypedArguments as a read-only execution mechanism. The hook saves the previous read-only state, sets runtime.SetReadOnly(true), executes the destination context, and then restores the previous read-only state. However, the indirect contract delete and upgrade paths do not reject execution when runtime.ReadOnly() is true. As a result, a contract reached through read-only execution can call the production delete hook for a target contract it owns. The delete path appends the target address to vmOutput.DeletedAccounts, the output context merges DeletedAccounts into the caller output, and the smart contract processor later processes the VM output by deleting accounts listed in that field. The root cause is that read-only mode is applied as runtime state, but not enforced by the state-changing delete and upgrade host-core paths. This breaks the expected isolation boundary for workflows that rely on read-only calls to inspect another contract without allowing that callee to produce state-changing VM output. The issue is fixed in v1.7.17. Contract delete and upgrade host-core paths now reject execution when runtime.ReadOnly() is true. The invariant is regression-tested for delete, upgrade, storage writes, value transfers, and any VM output field that can later mutate chain state.