MAL-2025-192436 Malicious code in jsonschema-utf8 (PyPI)
Malicious package
Published
MAL-2025-192436 is a malicious package: jsonschema-utf8 (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-2025-192436/ (Markdown: https://insights.sbomify.com/MAL-2025-192436/index.md)
- Package
- jsonschema-utf8
- Registry
- PyPI
What is MAL-2025-192436?
MAL-2025-192436 is a malicious package in jsonschema-utf8, published on 10 Dec 2025.
Official description
Package clones a popular package (loguru, jsonschema, …). While it claims to have some additional features, the real change is an added compiled native library which is silently loaded in the background during the importing of the module. The exact behavior is unknown, but the binary is obfuscated
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2025-12-loguru-utf8
Reasons (based on the campaign):
clones-real-package
obfuscation
typosquatting
native-extension
What should I do about MAL-2025-192436?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.