Malicious code in saeka (PyPI)

The saeka package is a malicious tool that automates the verification of credit card data by exploiting real online retail services' APIs. It is used in a campaign labeled 2026-10-saeka, which is categorized as malicious due to its intent to facilitate credit card fraud. Multiple versions of the package, including 1.0.0 through 15.0, are affected. There is no CVSS score available for this threat.

The primary impact is financial fraud through the validation of stolen credit card information, enabling attackers to identify active and valid credit cards for further exploitation. This abuse of legitimate retail services can also lead to reputational damage and potential legal consequences for the affected services.

No patch or remediation is available for this malicious package. The best mitigation is to avoid using the saeka package and remove it from any environments where it is installed. Security teams should monitor for its presence and block its use. Since this is a malicious package rather than a vulnerability in legitimate software, remediation involves preventing its installation and use.