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OpenAdvisories
Malicious MAL-2025-191533

spellcheckers

PyPI package · versions 1.4.0, 1.3.0, 1.2.0, 1.1.1, 1.1.0, 1.0.0, 1.5.0

Reported Nov 15, 2025 · Updated Oct 30, 2026

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: google-open-source-security (c83520810b148ec74e509b16851a1fafa1bec576b502a5debabd9b52520d9754)
This package is malicious and typosquating the legitimate pyspellchecker library.
This package will deploy a remote-access trojan that allows the attacker full
control of the victim's host.

Source: kam193 (6585d4c29dd97a1e46f30047c7d67a6e4bbb19f9b41bc1f9ff0b5fc34b839c75)
Package contains hidden code that is effectively run during importing and downloads second stage code. Then, a process running in background periodically connects to a remote host and waits for next code to execute

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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2025-11-spellcheckers

Reasons (based on the campaign):

- obfuscation

- Downloads and executes a remote malicious script.

- The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.

Indicators of compromise

Shown defanged and not clickable. Search any indicator to find other packages using it.

Domains

URLs