{"id":"MAL-2025-191533","title":"Malicious code in spellcheckers (PyPI)","summary":"Malicious code in spellcheckers (PyPI)","severity":"critical","exploited":true,"vendor":"spellcheckers","product":"spellcheckers","ecosystem":"pip","affected":["spellcheckers"],"published":"2025-11-15","updated":"2026-10-30","sourceUpdated":"2026-10-30T09:45:05.186862951Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/MAL-2025-191533","references":[{"url":"https://helixguard.ai/blog/malicious-spellcheckers-2025-11-19"},{"url":"https://securityonline.info/pypi-typosquat-delivers-multi-layer-python-rat-bypassing-scanners-with-xor-encryption/"},{"url":"https://helixguard.ai/blog/malicious-spellcheckers-2025-11-19"},{"url":"https://bad-packages.kam193.eu/pypi/package/spellcheckers"},{"url":"https://www.aikido.dev/blog/malicious-pypi-packages-spellcheckpy-and-spellcheckerpy-deliver-python-rat"}],"tags":["osv","pip","malware"],"ingestedAt":"2026-10-30T19:05:36.337Z","slug":"MAL-2025-191533","body":"## Overview\n\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: google-open-source-security (c83520810b148ec74e509b16851a1fafa1bec576b502a5debabd9b52520d9754)\nThis package is malicious and typosquating the legitimate pyspellchecker library.\nThis package will deploy a remote-access trojan that allows the attacker full\ncontrol of the victim's host.\n\n## Source: kam193 (6585d4c29dd97a1e46f30047c7d67a6e4bbb19f9b41bc1f9ff0b5fc34b839c75)\nPackage 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\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2025-11-spellcheckers\n\n\nReasons (based on the campaign):\n\n\n - obfuscation\n\n\n - Downloads and executes a remote malicious script.\n\n\n - The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.\n\n\n## Affected packages\n\n- `spellcheckers`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"abyssal","depthScore":70,"depthScoreParts":{"impact":52.3,"likelihood":0,"exploitation":18,"ransomware":0},"changes":[]}