CVE-2026-43992 CRITICAL

CVE-2026-43992: JunoClaw: MCP write tools exposed raw BIP-39 mnemonic as a tool-call parameter

Vendor Dragonmonk111
Product junoclaw
Weakness CWE-200 · Info exposure
Published May 12, 2026
Last update May 13, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

JunoClaw is an agentic AI platform built on Juno Network. Prior to 0.x.y-security-1, every MCP write tool (send_tokens, execute_contract, instantiate_contract, upload_wasm, ibc_transfer, etc.) accepted 'mnemonic: string' as an explicit tool-call parameter. The BIP-39 seed was consequently embedded in the LLM tool-call JSON, exposing it to any transport, log, or telemetry surface in the path between the LLM provider and the MCP process. This vulnerability is fixed in 0.x.y-security-1.

Key dates

02Disclosure timeline

May 12, 2026 CVE published
May 13, 2026 Record updated