CVE-2026-43992

CRITICAL 9.8

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

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-200 CWE-312 CWE-522 CWE-532
Vendor	dragonmonk111
Product	junoclaw
Published	May 12, 2026
Last Updated	May 13, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Dragonmonk111 / junoclaw

< v0.x.y-security-1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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