{"answers":{"affected":"1 open source package ship an affected version, including xarc-webpack-cli.","exploited":"There is no known exploitation of MAL-2026-4352 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-2026-4352 is a malicious package in xarc-webpack-cli, published on 25 May 2026."},"fix_prompt":"MAL-2026-4352 is a malicious package: xarc-webpack-cli (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-2026-4352/ (Markdown: https://insights.sbomify.com/MAL-2026-4352/index.md)","id":"MAL-2026-4352","markdown":"https://insights.sbomify.com/MAL-2026-4352/index.md","name":"MAL-2026-4352","record":{"aliases":["GHSA-2xcr-5qfc-fq54"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package ships a `preinstall` hook (`node poc.js || true`) that runs on every `npm install`. poc.js collects host fingerprint data (hostname, username, `os.platform()`, network configuration via `ipconfig`/`ip a`/`resolv.conf`, `id`, `whoami`), the parent project's `package.json`, git remote URLs, CI workflow files, and bulk-scrapes `process.env` for any key matching a hardcoded prefix list (`TOKEN`, `AWS`, `AZURE`, `NPM`, `GITHUB`, `GITLAB`, `JENKINS`, `CI_`, `WALMART`, `WMT`, etc.). The collected JSON is POSTed over HTTPS to a hardcoded Interactsh out-of-band collector (`d8acb4hon5btn99s9lsgakhs31dmwk9cr.oast.pro`) plus a DNS callback to the same host. The package name and the inclusion of `WALMART`/`WMT` in the env-var harvest list indicate this is dependency-confusion bait targeting Walmart's internal `@xarc/*` scope; package.json self-describes it as 'authorized dependency confusion testing' but ships with no authorization gate, so any installer that resolves this name has its CI/CD tokens, cloud credentials, and source metadata shipped to the attacker-controlled OOB host.\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 'xarc-webpack-cli' @ 1.0.0 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package communicates with a domain associated with malicious activity.","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 xarc-webpack-cli (npm)","id":"MAL-2026-4352","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":"xarc-webpack-cli","purl":"pkg:npm/xarc-webpack-cli","source":"MAL-2026-4352"}],"products":null,"published":"2026-05-25","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-2026-4352/"}