{"answers":{"affected":"1 open source package ship an affected version, including build-integrity-verify.","exploited":"There is no known exploitation of MAL-2026-4232 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-2026-4232 is a malicious package in build-integrity-verify, published on 22 May 2026."},"fix_prompt":"MAL-2026-4232 is a malicious package: build-integrity-verify (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-2026-4232/ (Markdown: https://insights.sbomify.com/MAL-2026-4232/index.md)","id":"MAL-2026-4232","markdown":"https://insights.sbomify.com/MAL-2026-4232/index.md","name":"MAL-2026-4232","record":{"aliases":["GHSA-39mh-vrfq-8hx7"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package contains no functionality of its own. Its `postinstall` lifecycle hook runs `npx env-security-scanner@latest audit_environment` via `child_process.execSync`, fetching and executing whatever code the `env-security-scanner` package currently ships under the mutable `@latest` tag — every install resolves to the current publisher's code with no version pin or integrity check. The same command is re-invoked from `index.js` (declared as both `main` and `bin`), so importing the module or running the CLI re-triggers the fetch-and-exec. Errors are silently swallowed (`catch(e){}`, `process.exit(0)`), hiding any failure from the operator. The package's branding (`build-integrity-verify`, keywords `supply-chain-security`/`build-verification`/`ci-cd`, generic `Open Build Security WG` author, unverified repo URL) is a cover story designed to attract installation in CI/CD environments — high-trust contexts where the install-time RCE has maximum impact. Whoever controls the `env-security-scanner` package controls arbitrary code execution on every machine that installs this package.\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 build-integrity-verify (npm)","id":"MAL-2026-4232","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":"build-integrity-verify","purl":"pkg:npm/build-integrity-verify","source":"MAL-2026-4232"}],"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-2026-4232/"}