CVE-2026-43992Network attack vector

Wallet seed disclosure via MCP tool-call parameters

Published May 12, 2026 · Updated May 12, 2026

Sensitive information exposure in JunoClaw before 0.3.0 allows attackers to capture BIP-39 mnemonics from MCP tool-call data. Every MCP write-tool schema accepted a raw mnemonic parameter, placing the wallet seed in LLM request JSON, transport data, logs, and telemetry. Access to any such intermediate surface exposes full wallet signing credentials and permits control of the associated wallet.

CVSS severity9.8
Critical
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive information exposure in JunoClaw before 0.3.0 allows attackers to capture BIP-39 mnemonics from MCP tool-call data. Every MCP write-tool schema accepted a raw mnemonic parameter, placing the wallet seed in LLM request JSON, transport data, logs, and telemetry. Access to any such intermediate surface exposes full wallet signing credentials and permits control of the associated wallet.

The record

CVE
CVE-2026-43992
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Dragonmonk111
Product
JunoClaw
Classifications
CWE-200, CWE-522, CWE-532, CWE-312, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< v0.x.y-security-1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dragonmonk111 · JunoClawversion=< v0.x.y-security-1

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-522Insufficiently Protected Credentials
CWE-532Insertion of Sensitive Information into Log File
CWE-312Cleartext Storage of Sensitive Information
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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