MAL-2026-17757Critical▾ Abyssal⚠ Exploited in the wildMalicious code in webreader (PyPI)
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 52.3 · likelihood 0 · exploitation 18
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In this campaign, the main package (webreader) has an embeded pickle disguised as a config. A related dependency (pafer) contains code to load the pickle. During unpickling, malicious code embeded in the pickle file is automatically executed. It then establishes persistence via a PTH file and downloads the next stage payload. It finally acts like a RAT, allowing remote exfiltration and code execution.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-10-webreader
Reasons (based on the campaign):
rat
Downloads and executes a remote malicious script.
obfuscation
The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.
abuses-pth
persistence
The malicious code is intentionally included in a dependency of the package
files-exfiltration
webreaderRefer to the advisory for the patched release.