{"answers":{"affected":"1 open source package ship an affected version, including @w2d/web-components.","exploited":"There is no known exploitation of MAL-2026-5541 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-2026-5541 is a malicious package in @w2d/web-components, published on 11 Jun 2026."},"fix_prompt":"MAL-2026-5541 is a malicious package: @w2d/web-components (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-2026-5541/ (Markdown: https://insights.sbomify.com/MAL-2026-5541/index.md)","id":"MAL-2026-5541","markdown":"https://insights.sbomify.com/MAL-2026-5541/index.md","name":"MAL-2026-5541","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package targets the @w2d scope with an artificially high version (2.999.999) — the canonical dependency-confusion shape designed to outrank an internal registry's real package. On `npm install`, postinstall.js collects host identity (os.hostname(), os.userInfo(), process.cwd(), process.platform), base64-encodes the payload, and exfiltrates it to a hardcoded Burp Collaborator OAST domain `929u6o01dc28rl4mend089t9b0hr5ht6.oastify.com` over both HTTPS GET (postinstall.js:28) and DNS lookup (postinstall.js:31). Comments in the file self-describe the package as a dependency-confusion PoC against Allwyn AG / win2day. Regardless of the author's stated bug-bounty framing, any installer whose registry configuration resolves the public @w2d/web-components instead of the intended internal package will silently beacon host/user/cwd identifiers to the attacker-controlled OAST host on install.","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 @w2d/web-components (npm)","id":"MAL-2026-5541","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":"@w2d/web-components","purl":"pkg:npm/%40w2d%2Fweb-components","source":"MAL-2026-5541"}],"products":null,"published":"2026-06-11","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-2026-5541/"}