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OpenAdvisories
Malicious MAL-2025-192436

jsonschema-utf8

PyPI package · versions 4.1.2, 4.1.1, 4.1.0

Reported Dec 10, 2025 · Updated Dec 31, 2025

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: kam193 (61bf4fa82a7c398e580d547d641bc19e3b16ba446191da04f39dcf9cf9a41eab)
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

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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