{"answers":{"affected":"1 open source package ship an affected version, including chai-mocks.","exploited":"There is no known exploitation of MAL-2026-5306 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-2026-5306 is a malicious package in chai-mocks, published on 8 Jun 2026."},"fix_prompt":"MAL-2026-5306 is a malicious package: chai-mocks (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-2026-5306/ (Markdown: https://insights.sbomify.com/MAL-2026-5306/index.md)","id":"MAL-2026-5306","markdown":"https://insights.sbomify.com/MAL-2026-5306/index.md","name":"MAL-2026-5306","record":{"aliases":["GHSA-5wqh-hxqx-c6j3"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package masquerades as a pino-style logger middleware but is a remote code loader. When the exported middleware is invoked, index.js spawns a detached `node./lib/caller.js` child process. caller.js fetches https://jsonkeeper.com/b/U2BTS (with a second URL https://jsonkeeper.com/b/XRGF3 stored base64-encoded in a variable named DEV_API_KEY to disguise it as a configuration constant), reads the `cookie` field of the JSON response, and executes it via `new Function.constructor('require', s)(require)` — arbitrary attacker-controlled code execution with full Node `require` access on the consumer's machine. jsonkeeper.com is an anonymous, mutable paste service; the contents can be changed by the author at any time without republishing the package. The package name (`chai-mocks`) and bait API surface (exports `pino`, references DEFAULT_LEVELS/redact/customLevels, scripts named `smoke:pino`) are unrelated to the package's author identity (Alexus111 \u003chello@jsonspack.com\u003e) and are designed to lure developers who mistype or confuse it with the chai or pino logger ecosystems. The base64-obfuscated URLs and fake `DEV_API_KEY`/`DEV_SECRET_KEY` variable names confirm intent to hide the C2 endpoint.\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 chai-mocks (npm)","id":"MAL-2026-5306","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":"chai-mocks","purl":"pkg:npm/chai-mocks","source":"MAL-2026-5306"}],"products":null,"published":"2026-06-08","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-2026-5306/"}