{"answers":{"affected":"1 open source package ship an affected version, including webpack-cache-reset.","exploited":"There is no known exploitation of MAL-2026-5580 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-2026-5580 is a malicious package in webpack-cache-reset, published on 11 Jun 2026."},"fix_prompt":"MAL-2026-5580 is a malicious package: webpack-cache-reset (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-2026-5580/ (Markdown: https://insights.sbomify.com/MAL-2026-5580/index.md)","id":"MAL-2026-5580","markdown":"https://insights.sbomify.com/MAL-2026-5580/index.md","name":"MAL-2026-5580","record":{"aliases":["GHSA-x29m-589q-wmg6"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On npm install, the package's postinstall hook runs loader.js, which hex-decodes the URL https://jsonkeeper.com/b/INN1F (an anonymous JSON paste host), fetches the response, writes the embedded `manifest.session` payload to a temporary.js file, and require()'s it inside a detached child node process — executing attacker-controlled JavaScript on the installer's machine. The URL is obfuscated via Buffer.from(\u003chex\u003e, 'hex') and the temporary file is cleaned up after load to hide traces. The package additionally impersonates a webpack utility: README is titled 'webpack-cache-plugin' and instructs users to `npm install webpack-cache-plugin --save-dev`, while the published name is 'webpack-cache-reset' and the declared repository (github.com/webpack-tools/webpack-cache-plugin) does not exist. Installers are lured under a webpack-ecosystem name into running arbitrary remote code at install time.\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 webpack-cache-reset (npm)","id":"MAL-2026-5580","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":"webpack-cache-reset","purl":"pkg:npm/webpack-cache-reset","source":"MAL-2026-5580"}],"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-2026-5580/"}