MAL-2026-1543 Malicious code in aniresolve (PyPI)
Malicious package
Published
MAL-2026-1543 is a malicious package: aniresolve (PyPI). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-1543/ (Markdown: https://insights.sbomify.com/MAL-2026-1543/index.md)
- Package
- aniresolve
- Registry
- PyPI
What is MAL-2026-1543?
MAL-2026-1543 is a malicious package in aniresolve, published on 18 Mar 2026.
Official description
Package hides code that downloads and runs malware, likely an infostealer. The code is not directly called in the package suggesting it's a dependency or next stage in the infection chain.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-03-anistream
Reasons (based on the campaign):
Downloads and executes a remote executable.
infostealer
malware
What should I do about MAL-2026-1543?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.