{"answers":{"affected":"1 open source package ship an affected version, including tarpackage.","exploited":"There is no known exploitation of MAL-2026-4166 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-2026-4166 is a malicious package in tarpackage, published on 19 May 2026."},"fix_prompt":"MAL-2026-4166 is a malicious package: tarpackage (PyPI). 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-2026-4166/ (Markdown: https://insights.sbomify.com/MAL-2026-4166/index.md)","id":"MAL-2026-4166","markdown":"https://insights.sbomify.com/MAL-2026-4166/index.md","name":"MAL-2026-4166","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package exfiltrates env variables during installation\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\nCampaign: 2026-05-tarpackage\n\nReasons (based on the campaign):\n\n - The package overrides the install command in setup.py to execute malicious code during installation.\n\n - exfiltration-env-variables","ecosystems":["PyPI"],"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 tarpackage (PyPI)","id":"MAL-2026-4166","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"PyPI","fixed":[],"introduced":[],"last_affected":[],"package":"tarpackage","purl":"pkg:pypi/tarpackage","source":"MAL-2026-4166"}],"products":null,"published":"2026-05-19","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-2026-4166/"}