{"answers":{"affected":"1 open source package ship an affected version, including animatecss-postcss-plugin.","exploited":"There is no known exploitation of MAL-2026-6495 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-2026-6495 is a malicious package in animatecss-postcss-plugin, published on 26 Jun 2026."},"fix_prompt":"MAL-2026-6495 is a malicious package: animatecss-postcss-plugin (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-2026-6495/ (Markdown: https://insights.sbomify.com/MAL-2026-6495/index.md)","id":"MAL-2026-6495","markdown":"https://insights.sbomify.com/MAL-2026-6495/index.md","name":"MAL-2026-6495","record":{"aliases":["GHSA-p6ch-cw7w-ff5c"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"animatecss-postcss-plugin@1.0.1 ships a tiny PostCSS plugin factory whose body contains an obfuscator.io-style string-array + RC4 decoder (functions _0xa311, _0x4399, _0x12b0 with a ~120-entry encoded string table). When the exported plugin factory is invoked during a CSS build, it constructs a URL from the decoded string array, performs an HTTP fetch with a 60s AbortController and a retry loop (attempts 1..10), base64-decodes the response body's `message` field via Buffer.from(k, 'base64').toString('utf-8'), and executes the resulting JavaScript via `new Function('require', _)(require)` — giving the remote payload full Node `require` access inside the developer's build process. There is no legitimate reason for a PostCSS prefix-injection plugin to fetch and eval remote code, and the heavy obfuscation around the fetch destination and payload-handling logic confirms intent to hide the behavior from casual review. Any project that installs this plugin and runs its CSS build will execute attacker-controlled JavaScript with the privileges of the build process.\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 animatecss-postcss-plugin (npm)","id":"MAL-2026-6495","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","1.0.0"],"last_affected":["1.0.1"],"package":"animatecss-postcss-plugin","purl":"pkg:npm/animatecss-postcss-plugin","source":"MAL-2026-6495"}],"products":null,"published":"2026-06-26","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-2026-6495/"}