CVE-2026-46403— klever-io klever-go 处理逻辑错误漏洞
一分钟漏洞结论
影响对象
klever-io klever-go
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
klever-go是 klever-io klever-go 1.7.17之前版本存在处理逻辑错误漏洞，该漏洞源于间接合约删除和升级路径未在只读模式下拒绝执行，破坏了隔离边界，可能导致合同通过只读执行调用删除钩子，产生状态变更的VM输出。
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一、 漏洞 CVE-2026-46403 基础信息
漏洞信息
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Vulnerability Title
Klever-Go KVM read-only execution can commit contract delete and upgrade side effects
来源: CVE Program / CVE List V5
Vulnerability Description
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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
来源: CVE Program / CVE List V5
Vulnerability Title
klever-io klever-go 处理逻辑错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
klever-go是 klever-io klever-go 1.7.17之前版本存在处理逻辑错误漏洞，该漏洞源于间接合约删除和升级路径未在只读模式下拒绝执行，破坏了隔离边界，可能导致合同通过只读执行调用删除钩子，产生状态变更的VM输出。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-46403 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
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CVE-2026-46403 厂商安全公告 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-46403
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