PT-2026-40104 · Junoclaw · Junoclaw

CVE-2026-43992 · Published 2026-05-12 · Updated 2026-05-12

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions JunoClaw versions prior to 0.x.y-security-1

Description Every MCP write tool, including send tokens(), execute contract(), instantiate contract(), upload wasm(), and ibc transfer(), accepted mnemonic as an explicit tool-call parameter. This caused the BIP-39 seed (a standardized way to generate deterministic keys from a mnemonic phrase) to be embedded in the LLM tool-call JSON, exposing it to transport, log, or telemetry surfaces between the LLM provider and the MCP process.

Recommendations Update to version 0.x.y-security-1.

Exploit

Fix

Insertion into Log File

Cleartext Storage of Sensitive Information

Insufficiently Protected Credentials

Information Disclosure

Weakness Enumeration

CWE-532

CWE-312

CWE-522

CWE-200

Related Identifiers

CVE-2026-43992

GHSA-J75Q-8XVM-6C48

Affected Products

Junoclaw

References · 6

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43992.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-43992 · Security Note
• https://osv.dev/vulnerability/CVE-2026-43992 · Vendor Advisory
• https://github.com/Dragonmonk111/junoclaw/security/advisories/GHSA-j75q-8xvm-6c48 · Note
• https://github.com/Dragonmonk111/junoclaw/releases/tag/v0.x.y-security-1 · Note
• https://github.com/Dragonmonk111/junoclaw/commit/339701e · Note