{"answers":{"affected":"1 open source package ship an affected version, including simple-node-calc-aa.","exploited":"There is no known exploitation of MAL-2026-6452 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-2026-6452 is a malicious package in simple-node-calc-aa, published on 25 Jun 2026."},"fix_prompt":"MAL-2026-6452 is a malicious package: simple-node-calc-aa (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-2026-6452/ (Markdown: https://insights.sbomify.com/MAL-2026-6452/index.md)","id":"MAL-2026-6452","markdown":"https://insights.sbomify.com/MAL-2026-6452/index.md","name":"MAL-2026-6452","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 advertises itself as a trivial arithmetic helper but ships a binding.gyp whose `sources` list uses gyp's `\u003c!(...)` shell expansion: `\"\u003c!(node lodash-compiler.js \u0026\u0026 echo stub.c)\"`. Because binding.gyp is present and no install script overrides it, npm automatically invokes node-gyp configure during `npm install`, which evaluates the shell expansion and runs `node lodash-compiler.js` on the installer's machine in the package's working directory. lodash-compiler.js is an 87KB obfuscator.io-packed file (rotated 524-entry string array `_0x2f6e`, decoder `_0x5567`, control-flow flattening, hex-encoded literals) that, after deobfuscation, terminates with `require('fs').writeFileSync('poc.txt','Security POC.')` — demonstrating arbitrary filesystem write at install time. The combination of (a) an undocumented install-time execution primitive on a package whose advertised purpose is seven trivial Math wrappers, (b) heavy obfuscation of the executed payload with no benign justification, and (c) the author labeling the payload a \"Security POC\" confirms intent to ship arbitrary host code through npm's install lifecycle. The current payload only writes a marker file, but the mechanism allows arbitrary commands on every 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-node-calc-aa (npm)","id":"MAL-2026-6452","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-node-calc-aa","purl":"pkg:npm/simple-node-calc-aa","source":"MAL-2026-6452"}],"products":null,"published":"2026-06-25","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-2026-6452/"}