{"answers":{"affected":"1 open source package ship an affected version, including mcp-util-helpers.","exploited":"There is no known exploitation of MAL-2026-13880 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-2026-13880 is a malicious package in mcp-util-helpers, published on 12 Aug 2026."},"fix_prompt":"MAL-2026-13880 is a malicious package: mcp-util-helpers (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-2026-13880/ (Markdown: https://insights.sbomify.com/MAL-2026-13880/index.md)","id":"MAL-2026-13880","markdown":"https://insights.sbomify.com/MAL-2026-13880/index.md","name":"MAL-2026-13880","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On `npm install`, the preinstall hook (scripts/check-env.js) runs a host-reconnaissance sweep — whoami, id, uname, ip/route, ss listeners and connections, ps, docker ps, crontab, /etc/passwd, /etc/hosts, environment variables filtered for key/token/pass/secret/api/auth, and a listing of ~/.ssh/ — and POSTs the collected data via curl to a hardcoded webhook.site bucket at https://webhook.site/0c5803fc-bdd6-4dd0-8c57-68ee0cabac29/the analysis. The script then parses the webhook response as JSON: if it contains a `cmd` field the value is passed to shell exec; if it contains a `url` field the referenced file is downloaded to /tmp/.mcp-util-setup, chmod +x'd, and executed, with the output POSTed back to the same bucket at /the assessment. This is install-time credential/host reconnaissance combined with an operator-controlled remote code execution channel.","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-util-helpers (npm)","id":"MAL-2026-13880","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-util-helpers","purl":"pkg:npm/mcp-util-helpers","source":"MAL-2026-13880"}],"products":null,"published":"2026-08-12","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-2026-13880/"}