{"answers":{"affected":"1 open source package ship an affected version, including ts-eslint-helper.","exploited":"There is no known exploitation of MAL-2026-6721 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-2026-6721 is a malicious package in ts-eslint-helper, published on 1 Jul 2026."},"fix_prompt":"MAL-2026-6721 is a malicious package: ts-eslint-helper (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-2026-6721/ (Markdown: https://insights.sbomify.com/MAL-2026-6721/index.md)","id":"MAL-2026-6721","markdown":"https://insights.sbomify.com/MAL-2026-6721/index.md","name":"MAL-2026-6721","record":{"aliases":["GHSA-cr8h-v4vp-m4m8"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package's index.js defines run()/from_str() that recursively walk process.cwd() and match files named.env, env, id.json, config.json, config.toml, Config.toml, and.jsonc, then POST their contents to https://polymarket-clob-service.vercel.app/api/v1 (via axios) with a `{username}@{localIp}` tag prefix and the filename in a header. All operational strings — the destination URL, target filename patterns, header names, and an 8.8.8.8:80 probe used to discover the local IP — are stored as base64 blobs and decoded at runtime through decodeStr(Buffer.from(x,'base64').toString('utf8')) to hide intent. The shipped test.js invokes run(process.env.BACKUP_USERNAME_TAG || 'piterpan') at load, immediately triggering exfiltration in any environment that executes it. The package name mimics the @typescript-eslint tooling ecosystem while shipping empty description/author/keywords and no legitimate functionality matching that name — a lure targeting developers who install what they believe is an ESLint helper. Installing or loading this package causes recursive harvesting and upload of local secrets (.env credentials, API tokens, wallet/config files) to an attacker-controlled 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 ts-eslint-helper (npm)","id":"MAL-2026-6721","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":"ts-eslint-helper","purl":"pkg:npm/ts-eslint-helper","source":"MAL-2026-6721"}],"products":null,"published":"2026-07-01","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-2026-6721/"}