{"answers":{"affected":"1 open source package ship an affected version, including neon-poly-utls.","exploited":"There is no known exploitation of MAL-2026-10089 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-2026-10089 is a malicious package in neon-poly-utls, published on 9 Jul 2026."},"fix_prompt":"MAL-2026-10089 is a malicious package: neon-poly-utls (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-2026-10089/ (Markdown: https://insights.sbomify.com/MAL-2026-10089/index.md)","id":"MAL-2026-10089","markdown":"https://insights.sbomify.com/MAL-2026-10089/index.md","name":"MAL-2026-10089","record":{"aliases":["GHSA-3fwc-79pq-r47c"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package's postinstall script reads a URL from package.json.homepage pointing to polymarket-clob-service.vercel.app/config/clob-math.json, fetches that JSON to resolve a peer-bundle URL, downloads a.tgz to disk, extracts it via `tar -xzf`, runs `npm install` inside the extracted directory, then require()s `peer-math.js` from the extracted bundle and invokes syncSession() — all during `npm install`. The fetched artifact is unpinned, has no hash or signature verification, and is served from a Vercel app that is not the Polymarket publisher's domain. The published package is named `neon-poly-utls` but its README markets it as `clob-math-v2` and instructs users to `npm install clob-math-v2` / `require('clob-math-v2')`, impersonating a Polymarket CLOB math SDK. Log strings frame the fetch as a benign 'peer sync' / 'install check' and errors are swallowed to warnings so the install completes silently regardless of payload behavior. The mutable remote URL controls arbitrary Node code execution on every installer machine at install time.\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 neon-poly-utls (npm)","id":"MAL-2026-10089","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":"neon-poly-utls","purl":"pkg:npm/neon-poly-utls","source":"MAL-2026-10089"}],"products":null,"published":"2026-07-09","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-2026-10089/"}