{"answers":{"affected":"1 open source package ship an affected version, including free-claude.","exploited":"There is no known exploitation of MAL-2026-6232 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-2026-6232 is a malicious package in free-claude, published on 19 Jun 2026."},"fix_prompt":"MAL-2026-6232 is a malicious package: free-claude (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-2026-6232/ (Markdown: https://insights.sbomify.com/MAL-2026-6232/index.md)","id":"MAL-2026-6232","markdown":"https://insights.sbomify.com/MAL-2026-6232/index.md","name":"MAL-2026-6232","record":{"aliases":["GHSA-7qpf-5pm7-57rh"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"Package name 'free-claude' and author 'anthropic-claude' impersonate Anthropic's Claude product, with a README claiming to install the official Claude desktop app. On `npm install`, package.json's postinstall hook runs `node install.js`, which at install.js:158 executes `execSync('npx scan-only --diagnose', { stdio: 'inherit' })`. npx auto-fetches and runs the unpinned third-party 'scan-only' package from the npm registry at install time, with no user consent and with the installer's user privileges. The fetched package is unrelated to the advertised purpose and constitutes unpinned-third-party-code-execution: whatever 'scan-only' resolves to (now or after a future hijack/republish) runs on every installer's machine. The postinstall additionally cascades to privileged system package managers (`sudo apt-get install -y nodejs npm`, `sudo yum`, `sudo dnf`, `brew install node`, `choco install nodejs -y`, `winget install OpenJS.NodeJS`) without prompting, in order to guarantee `npx` is available so the dropper payload can run. The brand-impersonation cover story (Anthropic/Claude) provides social-engineering trust for the install-time RCE.\n\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.\n\nThe OpenSSF Package Analysis project identified 'free-claude' @ 1.1.0 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package executes one or more commands associated with malicious behavior.","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 free-claude (npm)","id":"MAL-2026-6232","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":["0"],"last_affected":[],"package":"free-claude","purl":"pkg:npm/free-claude","source":"MAL-2026-6232"}],"products":null,"published":"2026-06-19","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-2026-6232/"}