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

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Summary

CVECVE-2026-43992
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-12 17:16:21 UTC
Updated2026-05-12 17:16:21 UTC
DescriptionJunoClaw 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Dragonmonk111 Junoclaw affected < v0.x.y-security-1 Not specified

References

ReferenceSourceLinkTags
github.com/Dragonmonk111/junoclaw/releases/tag/v0.x.y-security-1 [email protected] github.com
github.com/Dragonmonk111/junoclaw/security/advisories/GHSA-j75q-8xvm-6c48 [email protected] github.com
github.com/Dragonmonk111/junoclaw/commit/339701e [email protected] github.com
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