CVE-2026-43992CWE-200CWE-312CWE-522CWE-532
JunoClaw: MCP write tools exposed raw BIP-39 mnemonic as a tool-call parameter
Critical · published May 12, 2026
What it is
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.
The record
Technical detail
- CVSS v3.1
- 9.8 · CRITICAL
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS v4.0
- Not supplied
- EPSS
- 0.00374 · 30.1th percentile
- Weaknesses
- CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor; CWE-312 · Cleartext Storage of Sensitive Information; CWE-522 · Insufficiently Protected Credentials; CWE-532 · Insertion of Sensitive Information into Log File
- Published
- 2026-05-12T16:25Z
EPSS history
Timeline