{"answers":{"affected":"1 open source package ship an affected version, including streak-daybucket.","exploited":"There is no known exploitation of MAL-2026-12464 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-2026-12464 is a malicious package in streak-daybucket, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12464 is a malicious package: streak-daybucket (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-2026-12464/ (Markdown: https://insights.sbomify.com/MAL-2026-12464/index.md)","id":"MAL-2026-12464","markdown":"https://insights.sbomify.com/MAL-2026-12464/index.md","name":"MAL-2026-12464","record":{"aliases":["GHSA-6hxq-4f7r-8562"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"streak-daybucket@1.0.0 presents itself as a day-bucket / streak math utility but its index.mjs embeds a hex-encoded Windows PE binary (leading `4D5A90...` MZ header) alongside hex-encoded path components that decode to `%APPDATA%/Roaming/Microsoft/Windows/Start Menu/Programs/Startup/vite-native-helper.exe`. On module load, a try/catch decodes the hex arrays with `Buffer.from(hex, 'hex')` and writes the executable into the current user's Startup folder via `fs.write*`. Because the drop runs at top-level module evaluation, any `import`/`require` of the package (including transitive consumption) causes the PE to be planted, and Windows will execute it automatically on the next user login, establishing persistent code execution on the installer's host. The path strings, filename `vite-native-helper.exe`, and payload body are stored as split hex-array literals joined at runtime to evade static string scanning, while the surrounding module ships plain-source math helpers as a cover story.\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 streak-daybucket (npm)","id":"MAL-2026-12464","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":"streak-daybucket","purl":"pkg:npm/streak-daybucket","source":"MAL-2026-12464"}],"products":null,"published":"2026-08-05","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-2026-12464/"}