{"id":"CVE-2026-43992","aliases":["EUVD-2026-29541","GHSA-j75q-8xvm-6c48"],"status":"published","title":"JunoClaw: MCP write tools exposed raw BIP-39 mnemonic as a tool-call parameter","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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00225,"percentile":0.13289,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200","CWE-312","CWE-522","CWE-532"],"published":"2026-05-12T16:25:30Z","modified":"2026-10-28T02:31:08Z","products":[{"vendor":"dragonmonk111","product":"junoclaw"}],"references":[{"url":"https://github.com/Dragonmonk111/junoclaw/security/advisories/GHSA-j75q-8xvm-6c48","tags":["x_refsource_CONFIRM","advisory"]},{"url":"https://github.com/Dragonmonk111/junoclaw/commit/339701e","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/Dragonmonk111/junoclaw/releases/tag/v0.x.y-security-1","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43992.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43992","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-43992","title":"JunoClaw: MCP write tools exposed raw BIP-39 mnemonic as a tool-call parameter","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.","status":"published","published":"2026-05-12T16:25:30.868Z","modified":"2026-05-13T14:38:16.906Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-200","CWE-312","CWE-522","CWE-532"],"updated_at":"2026-11-02T13:37:36.275898Z"}],"euvd":[{"id":"EUVD-2026-29541","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.","status":"published","published":"2026-05-12T16:25:30Z","modified":"2026-05-13T14:38:16Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T19:04:33.75998Z"}],"nvd":[{"id":"CVE-2026-43992","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.","status":"published","published":"2026-05-12T17:16:21.24Z","modified":"2026-10-26T18:10:00.173Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-200","CWE-312","CWE-522","CWE-532"],"updated_at":"2026-11-02T14:12:18.613259Z"}],"osv":[{"id":"CVE-2026-43992","title":"JunoClaw: MCP write tools exposed raw BIP-39 mnemonic as a tool-call parameter","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.","status":"published","published":"2026-05-12T16:25:30.868Z","modified":"2026-10-28T02:31:08.621710797Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-200","CWE-312","CWE-522","CWE-532"],"updated_at":"2026-11-02T15:45:04.820169Z"}]}}