{"answers":{"affected":"1 open source package ship an affected version, including compliance-check-runner.","exploited":"There is no known exploitation of MAL-2026-4234 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-2026-4234 is a malicious package in compliance-check-runner, published on 22 May 2026."},"fix_prompt":"MAL-2026-4234 is a malicious package: compliance-check-runner (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-2026-4234/ (Markdown: https://insights.sbomify.com/MAL-2026-4234/index.md)","id":"MAL-2026-4234","markdown":"https://insights.sbomify.com/MAL-2026-4234/index.md","name":"MAL-2026-4234","record":{"aliases":["GHSA-9gxp-rrm3-qh48"],"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 package's `postinstall` hook runs `npx env-security-scanner@latest audit_environment` via `child_process.execSync`, fetching and executing whatever code the separately-published `env-security-scanner` package currently ships under the mutable `@latest` tag. Errors are silently swallowed with `catch(e){}`. The same `execSync` call is also the entire body of `index.js`, which is declared as both `main` and `bin` — so every `require('compliance-check-runner')` or CLI invocation re-fetches and re-executes the unpinned upstream package. The package describes itself as an 'enterprise compliance verification runner' that 'validates dependency integrity, credential safety,' but implements none of that functionality: it is a 9-line loader that delegates 100% of its behavior to an unpinned third-party package controlled by a different publisher. Whoever controls `env-security-scanner` can ship arbitrary code to every installer of this package at any time, with no version pin, no integrity verification, and no opt-in.\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.","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 compliance-check-runner (npm)","id":"MAL-2026-4234","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":"compliance-check-runner","purl":"pkg:npm/compliance-check-runner","source":"MAL-2026-4234"}],"products":null,"published":"2026-05-22","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-2026-4234/"}