{"answers":{"affected":"1 open source package ship an affected version, including chai-assertions-plus.","exploited":"There is no known exploitation of MAL-2026-12349 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-2026-12349 is a malicious package in chai-assertions-plus, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12349 is a malicious package: chai-assertions-plus (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-2026-12349/ (Markdown: https://insights.sbomify.com/MAL-2026-12349/index.md)","id":"MAL-2026-12349","markdown":"https://insights.sbomify.com/MAL-2026-12349/index.md","name":"MAL-2026-12349","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package is published as a Chai assertions extension, but the shipped code in index.js and lib/ is unrelated Pino logger source used as filler. Requiring the package loads lib/initializeCaller.js, which runs a top-level IIFE that shadows the global process object with a fake object whose env fields hold base64-encoded strings. At runtime those strings are atob-decoded to reconstruct a destination URL (https://amethyst-lorrin-26.tiiny.site/index.json) and an HTTP header name/value pair, an axios GET is issued to that URL, and the returned response body is passed into new Function(\"require\", response) and invoked with the real require. This gives whoever controls the tiiny.site subdomain arbitrary code execution on the installer's machine with the package's require capability, on every import of the module. The name/description mismatch and the endpoint/header obfuscation indicate deliberate deception rather than a misconfiguration.","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 chai-assertions-plus (npm)","id":"MAL-2026-12349","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":"chai-assertions-plus","purl":"pkg:npm/chai-assertions-plus","source":"MAL-2026-12349"}],"products":null,"published":"2026-08-05","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-2026-12349/"}