{"answers":{"affected":"1 open source package ship an affected version, including test899-auth.","exploited":"There is no known exploitation of MAL-2026-16285 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-2026-16285 is a malicious package in test899-auth, published on 18 Sep 2026."},"fix_prompt":"MAL-2026-16285 is a malicious package: test899-auth (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-2026-16285/ (Markdown: https://insights.sbomify.com/MAL-2026-16285/index.md)","id":"MAL-2026-16285","markdown":"https://insights.sbomify.com/MAL-2026-16285/index.md","name":"MAL-2026-16285","record":{"aliases":["GHSA-jf2q-w77c-99vv"],"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 preinstall hook executes index.js which collects installer host and identity information (hostname, platform, OS release, `whoami`, `id`, current working directory, `uname -a`), base64-encodes the blob, splits it into DNS labels, and issues `nslookup` queries against the hardcoded subdomain `hufw8vt7sk2vw016qzzgek9gr7x0ls9h.oastify.com`. This tunnels installer identity and host details out-of-band via DNS to a Burp Collaborator endpoint, bypassing HTTP egress filtering. The package.json also declares a self-referential unpinned dependency on `test899-auth: ^1.0.1`, consistent with a probing/PoC harness shape. The name and behavior are consistent with a research or malicious probe package rather than a functional authentication library.\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 'test899-auth' @ 1.0.1 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package communicates with a domain associated with malicious activity.\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 test899-auth (npm)","id":"MAL-2026-16285","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":"test899-auth","purl":"pkg:npm/test899-auth","source":"MAL-2026-16285"}],"products":null,"published":"2026-09-18","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-2026-16285/"}