Malicious code in uvhttp-custom (PyPI)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (bf8bf69e0edd8a79c920c35d2c49e722b38d801c07401dfb673bdb1beb6ea3fc) setup.py contains an obfuscated payload of the form `(lambda __: exec(__import__('base64').b64decode('...').decode()))(None)` alongside an otherwise-benign setuptools import. The decoded payload writes a bundled script.ps1 to disk and invokes `powershell -ExecutionPolicy Bypass -File script.ps1`. The PowerShell script uses System.Net.WebClient.DownloadFile to fetch a Windows executable from cdn.discordapp.com/attachments/1532996358427115552/1539384056284717066/enlisted_launcher_1.0.3.190-movn8hpfe.exe into %TEMP%\file.exe and launches it via Start-Process with -WindowStyle Hidden. No hash or signature verification is performed. The payload also invokes `os.system("calc")`. Running `pip install uvhttp-custom` on Windows therefore causes the installer's machine to download and silently execute an opaque, unsigned binary from an anonymous Discord CDN URL. ## Source: kam193 (9d56fe693f2b6e693e195640269a9ad95c8ab5eb94c897bbc711e897177c4cc6) During installation, obfuscated code downloads and executes an executable. It appears to be a game launcher. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-09-uvhttp-custom Reasons (based on the campaign): - The package overrides the install command in setup.py to execute malicious code during installation. - Downloads and executes a remote executable. - obfuscation
Malicious code in uvhttp-custom (PyPI)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (bf8bf69e0edd8a79c920c35d2c49e722b38d801c07401dfb673bdb1beb6ea3fc) setup.py contains an obfuscated payload of the form `(lambda __: exec(__import__('base64').b64decode('...').decode()))(None)` alongside an otherwise-benign setuptools import. The decoded payload writes a bundled script.ps1 to disk and invokes `powershell -ExecutionPolicy Bypass -File script.ps1`. The PowerShell script uses System.Net.WebClient.DownloadFile to fetch a Windows executable from cdn.discordapp.com/attachments/1532996358427115552/1539384056284717066/enlisted_launcher_1.0.3.190-movn8hpfe.exe into %TEMP%\file.exe and launches it via Start-Process with -WindowStyle Hidden. No hash or signature verification is performed. The payload also invokes `os.system("calc")`. Running `pip install uvhttp-custom` on Windows therefore causes the installer's machine to download and silently execute an opaque, unsigned binary from an anonymous Discord CDN URL. ## Source: kam193 (9d56fe693f2b6e693e195640269a9ad95c8ab5eb94c897bbc711e897177c4cc6) During installation, obfuscated code downloads and executes an executable. It appears to be a game launcher. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-09-uvhttp-custom Reasons (based on the campaign): - The package overrides the install command in setup.py to execute malicious code during installation. - Downloads and executes a remote executable. - obfuscation
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-15863
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["PyPI"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a9ad4f4acd9273b49b67985
Added to database: 09/04/2026, 14:25:56 UTC
Last updated: 09/04/2026, 14:25:56 UTC
Views: 1
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