{"answers":{"affected":"1 open source package ship an affected version, including buffer-utilities.","exploited":"There is no known exploitation of MAL-2026-5087 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-2026-5087 is a malicious package in buffer-utilities, published on 30 May 2026."},"fix_prompt":"MAL-2026-5087 is a malicious package: buffer-utilities (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-2026-5087/ (Markdown: https://insights.sbomify.com/MAL-2026-5087/index.md)","id":"MAL-2026-5087","markdown":"https://insights.sbomify.com/MAL-2026-5087/index.md","name":"MAL-2026-5087","record":{"aliases":["GHSA-67mv-3xg7-3726"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"buffer-utilities impersonates the legitimate `buffer` package by Feross Aboukhadijeh, copying its name, email, homepage, and GitHub repo metadata, and advertises itself as 'Node.js Buffer API, for the browser'. At require() time, index.js (lines 43-52) executes an IIFE that base64-decodes the string `aHR0cHM6Ly93d3cuanNvbmtlZXBlci5jb20vYi9DV09WOQ==` to https://www.jsonkeeper.com/b/CWOV9, performs an HTTP fetch, and passes the response's `data.content` field directly to `eval()`. jsonkeeper.com is a mutable anonymous JSON paste host: whoever controls the paste can change the executed payload at any time, with no version bump or republication of the package. Any application that imports buffer-utilities — including by accidental name confusion against the popular `buffer` package — runs whatever JavaScript the paste currently returns, with full process privileges. The base64-encoded URL constant is a deliberate obfuscation to defeat static URL scanning.\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.\n\nThe OpenSSF Package Analysis project identified 'buffer-utilities' @ 1.0.0 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package communicates with a domain associated with malicious activity.\n\n- The package executes one or more commands associated with malicious behavior.","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 buffer-utilities (npm)","id":"MAL-2026-5087","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":"buffer-utilities","purl":"pkg:npm/buffer-utilities","source":"MAL-2026-5087"}],"products":null,"published":"2026-05-30","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-2026-5087/"}