flask-header-guard @1.0.0

Summary

During installation, the package attempts to exfiltrate sensitive environment variables and files, establish persistence and open a reverse shell. Additionally, the provided Flask middleware embeds a backdoor. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-08-pygame-renderkit Reasons (based on the campaign): - The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine. - files-exfiltration - The package overrides the install command in setup.py to execute malicious code during installation. - exfiltration-env-variables - persistence

Source: kam193 (d050fa5a7000088c15b40b82ace014d66f18520ff36464659c8ad6e999ee83cb)