{"answers":{"affected":"2 open source packages ship an affected version, including cmd2func.","exploited":"There is no known exploitation of MAL-2026-5290 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-2026-5290 is a malicious package in cmd2func, published on 6 Jun 2026."},"fix_prompt":"MAL-2026-5290 is a malicious package: cmd2func (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-2026-5290/ (Markdown: https://insights.sbomify.com/MAL-2026-5290/index.md)","id":"MAL-2026-5290","markdown":"https://insights.sbomify.com/MAL-2026-5290/index.md","name":"MAL-2026-5290","record":{"aliases":["PYSEC-2026-579"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package installs cmd2func-setup.pth, a.pth file that Python auto-loads at every interpreter start. The single-line payload uses the.pth import-trick with `or exec(...)` and mangled single-letter identifiers to smuggle a multi-statement body past review. When executed, the payload checks for a sentinel at /tmp/.bun_ran and, if absent, downloads the Bun runtime zip from https://github.com/oven-sh/bun/releases/download/bun-v1.3.13/bun-{platform}-{arch}.zip into /tmp/b/, extracts the `bun` binary, chmods it executable (0o775), and runs `bun run _index.js` against a JS file resolved via glob inside the package. The advertised purpose of cmd2func is `Convert command to callable Python object` — there is no legitimate need for an alternate JavaScript runtime. The combination of a hidden.pth auto-loader, obfuscated payload, alternate-runtime dropper, and unrelated JS execution is a covert dropper that fires on every Python interpreter invocation after install, not just at install time. The RECORD/metadata references the prior 0.2.1 version, consistent with a hijack of a previously legitimate package.\n\nVersions 0.2.2, 0.2.3 were compromised.\n\nCompromised packages start an obfuscated infostealer. The infostealer is a heavily obfuscated JavaScript code executed using Bun runtime on Python startup. It collectes all kinds of sensitive data, including API keys, credentials to package repositories, cryptocurrency assets, password manager data. Infostealer actively queries online services to collect additional secrets as well as attempts to gain persistence and spread further by publishing infected packages using collected credentials. Data are exfiltrated likely using Github. The code seems to threaten to wipe the user's data if it detects invalid GitHub tokens. Cleanup should be done with caution.\n\nIt seems to be related to the recent Mini Shai Hulud campaign.\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\nCampaign: 2026-06-compr-woodpecker\n\nReasons (based on the campaign):\n\n - compromised-package\n\n - exfiltration-env-variables\n\n - exfiltration-cloud-tokens\n\n - exfiltration-credentials\n\n - abuses-pth\n\n - obfuscation\n\n - infostealer\n\n - The package contains code to detect if it is running in a sandbox environment.\n\n - exfiltration-crypto\n\n - files-exfiltration\n\n - destructive-actions","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 cmd2func (PyPI)","id":"MAL-2026-5290","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":null,"packages":[{"ecosystem":"PyPI","fixed":[],"introduced":[],"last_affected":[],"package":"cmd2func","purl":"pkg:pypi/cmd2func","source":"MAL-2026-5290"},{"ecosystem":"PyPI","fixed":[],"introduced":[],"last_affected":[],"package":"cmd2func","purl":"pkg:pypi/cmd2func","source":"PYSEC-2026-579"}],"products":null,"published":"2026-06-06","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-5290/"}