{"answers":{"affected":"1 open source package ship an affected version, including ac-polyfills.","exploited":"There is no known exploitation of MAL-2026-782 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-2026-782 is a malicious package in ac-polyfills, published on 6 Feb 2026."},"fix_prompt":"MAL-2026-782 is a malicious package: ac-polyfills (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-2026-782/ (Markdown: https://insights.sbomify.com/MAL-2026-782/index.md)","id":"MAL-2026-782","markdown":"https://insights.sbomify.com/MAL-2026-782/index.md","name":"MAL-2026-782","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"ac-polyfills@2.10.0 declares a preinstall lifecycle script in package.json (line 7-8) that runs `wget` to a hardcoded webhook.site collector URL (https://webhook.site/381d4406-8f87-4aab-961f-7a9496c21821/), sending the installer's username ($(whoami)), current working directory ($(pwd)), and hostname ($(hostname)) as query parameters. This fires automatically on `npm install` with no user interaction, exfiltrating installer identity and host information to a third-party webhook collector. The package name and shape are consistent with a dependency-confusion probe targeting an internal package name.\n\nThe OpenSSF Package Analysis project identified 'ac-polyfills' @ 2.10.0 (npm) as malicious.\n\nIt is considered malicious because:\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 ac-polyfills (npm)","id":"MAL-2026-782","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":"ac-polyfills","purl":"pkg:npm/ac-polyfills","source":"MAL-2026-782"}],"products":null,"published":"2026-02-06","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-2026-782/"}