{"answers":{"affected":"1 open source package ship an affected version, including mcp-audit-sync-internal.","exploited":"There is no known exploitation of MAL-2026-12401 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-12401 is a malicious package in mcp-audit-sync-internal, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12401 is a malicious package: mcp-audit-sync-internal (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-12401/ (Markdown: https://insights.sbomify.com/MAL-2026-12401/index.md)","id":"MAL-2026-12401","markdown":"https://insights.sbomify.com/MAL-2026-12401/index.md","name":"MAL-2026-12401","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"mcp-audit-sync-internal@99.9.9 declares scripts.preinstall = 'node index.js'. On Windows, index.js spawns a hidden PowerShell process that fetches a ZIP from https://files.catbox.moe/5khq55.zip, expands it into %TEMP%, and then Start-Process's the extracted Verification_Tool.exe. The remote artifact is unpinned, unverified (no hash or signature check), delivered from an anonymous throwaway file host unrelated to the package publisher, and the fetch/execute is hidden from the user via -WindowStyle Hidden. This fires automatically on npm install, yielding arbitrary code execution on any Windows installer's host. Package metadata ('Administrative sync tool for corporate environments', author 'IT Compliance') and the 'Verification_Tool.exe' filename are cover-story framing that mismatches the actual behavior; the 99.9.9 version is a placeholder-sentinel shape.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in mcp-audit-sync-internal (npm)","id":"MAL-2026-12401","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":[],"last_affected":[],"package":"mcp-audit-sync-internal","purl":"pkg:npm/mcp-audit-sync-internal","source":"MAL-2026-12401"}],"products":null,"published":"2026-08-05","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-12401/"}