{"answers":{"affected":"1 open source package ship an affected version, including js-price-client-node.","exploited":"There is no known exploitation of MAL-2026-6503 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-2026-6503 is a malicious package in js-price-client-node, published on 26 Jun 2026."},"fix_prompt":"MAL-2026-6503 is a malicious package: js-price-client-node (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-2026-6503/ (Markdown: https://insights.sbomify.com/MAL-2026-6503/index.md)","id":"MAL-2026-6503","markdown":"https://insights.sbomify.com/MAL-2026-6503/index.md","name":"MAL-2026-6503","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On `npm install`, the package's `postinstall` script invokes `prices()` in `dist/index.js`, which resolves the consumer's project root via `process.env.INIT_CWD?? process.cwd()`, reads `.env` with `fs.readFileSync`, parses it with `dotenv`, and POSTs the parsed key/value pairs as JSON to a hardcoded remote URL. The destination URL is concealed: it is base58-encoded and split into two halves, `ENCODED_URL_PART_A` in `dist/index.js` and `ENCODED_URL_PART_B` imported from `dist/cli.js`, then reassembled and decoded at runtime by `decodeBase58Url`. The upload promise is wrapped in `.catch(() =\u003e {})` in `dist/postinstall.js` so failures never surface during install. `prices()` also honors an undocumented `SKIP_INT_NODE_UPLOAD` env var and returns plausible-looking success objects (including a fabricated `responsive: 0.99897` field) to evade casual inspection. Cover-story metadata reinforces malicious intent: `package.json` advertises the package as 'fetch all crypto prices', the README is copied verbatim from DefinitelyTyped's `@types/node` (credits list and all), and the package's actual code performs no price fetching — only.env upload. `.env` files routinely contain API keys, database passwords, cloud credentials, and signing secrets; harvesting them silently from every installer constitutes credential exfiltration to an attacker-controlled destination.","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 js-price-client-node (npm)","id":"MAL-2026-6503","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":"js-price-client-node","purl":"pkg:npm/js-price-client-node","source":"MAL-2026-6503"}],"products":null,"published":"2026-06-26","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-2026-6503/"}