{"answers":{"affected":"1 open source package ship an affected version, including parallely.","exploited":"There is no known exploitation of MAL-2026-11143 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-2026-11143 is a malicious package in parallely, published on 28 Jul 2026."},"fix_prompt":"MAL-2026-11143 is a malicious package: parallely (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-2026-11143/ (Markdown: https://insights.sbomify.com/MAL-2026-11143/index.md)","id":"MAL-2026-11143","markdown":"https://insights.sbomify.com/MAL-2026-11143/index.md","name":"MAL-2026-11143","record":{"aliases":["GHSA-rmhx-v9xh-x4jv"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The npm package name `parallely` typosquats `concurrently`: package.json advertises the concurrently repository, author, and funding while shipping different code. On library load, an IIFE inside `resolveShell` in dist/lib/spawn.js reconstructs a hidden download URL at runtime by AES-256-GCM decrypting a hardcoded ciphertext (key XOR'd from four base64 constants; IV and auth tag hardcoded), then downloads a platform-specific payload (linux/mac binary or win.js) into os.tmpdir()/ins-\u003ceuid\u003e/, sha256-verifies it against a fetched `.meta`, chmods it executable, strips the macOS quarantine attribute via `xattr -c`, and spawns it detached and unref'd. The same block installs anti-analysis guards: it silences uncaughtException/warning handlers, reads /proc/self/status to check `TracerPid`, calls inspector.url(), and scans env/argv for `--inspect`/`--debug`, short-circuiting if any debugger signal is present. A self-relaunch guarded by environment-variable tags is used to survive being imported versus exec'd. The C2 host is not present in plaintext; it is reconstructed only at runtime specifically to defeat static inspection.\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 parallely (npm)","id":"MAL-2026-11143","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":"parallely","purl":"pkg:npm/parallely","source":"MAL-2026-11143"}],"products":null,"published":"2026-07-28","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-2026-11143/"}