{"answers":{"affected":"1 open source package ship an affected version, including unique-id-64.","exploited":"There is no known exploitation of MAL-2026-4781 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-2026-4781 is a malicious package in unique-id-64, published on 26 May 2026."},"fix_prompt":"MAL-2026-4781 is a malicious package: unique-id-64 (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-2026-4781/ (Markdown: https://insights.sbomify.com/MAL-2026-4781/index.md)","id":"MAL-2026-4781","markdown":"https://insights.sbomify.com/MAL-2026-4781/index.md","name":"MAL-2026-4781","record":{"aliases":["GHSA-wp6h-8x7v-865g"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"Package impersonates the well-known sindresorhus/unique-string utility: package.json copies the author block (name 'Sindre Sorhus', email sindresorhus@hotmail.com, homepage sindresorhus.com), repository field 'sindresorhus/unique-string', and README verbatim, despite not being published by that author. The default export, when invoked as uniqueString(64), AES-256-CBC-decrypts a hardcoded ciphertext (key derived from sha256('256-key')) and hands the plaintext to globalThis.eval, with 'eval' reconstructed obfuscation-style by joining the first letters of ['error','vertex','alphabetic','length']. Before reaching the eval branch, the code consults node-env-detector and short-circuits to a warning log when env.isCI || env.isNpmBot || env.isContainer || env.isVirtualMachineLikely is true — a deliberate sandbox/CI evasion gate so the hidden payload only fires on real developer or production hosts. The combination of identity-spoofed metadata, encrypted eval'd payload, and analysis-evasion gating is an unambiguous supply-chain attack: the installer cannot see what code runs, and the package's stated purpose (generate a unique string) does not require eval, AES decryption, or CI detection.\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 unique-id-64 (npm)","id":"MAL-2026-4781","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":"unique-id-64","purl":"pkg:npm/unique-id-64","source":"MAL-2026-4781"}],"products":null,"published":"2026-05-26","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-2026-4781/"}