CVE-2026-43992 PUBLISHED

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

Assigner: GitHub_M
Reserved: 04.05.2026 Published: 12.05.2026 Updated: 12.05.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Product Status

Vendor Dragonmonk111
Product junoclaw
Versions
  • Version < v0.x.y-security-1 is affected

References

Problem Types

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE
  • CWE-312: Cleartext Storage of Sensitive Information CWE
  • CWE-522: Insufficiently Protected Credentials CWE
  • CWE-532: Insertion of Sensitive Information into Log File CWE