CVE-2023-34457: Mechanicalsoup Project Mechanicalsoup

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

MechanicalSoup is a Python library for automating interaction with websites. Starting in version 0.2.0 and prior to version 1.3.0, a malicious web server can read arbitrary files on the client using a `<input type="file" ...>` inside HTML form. All users of MechanicalSoup's form submission are affected, unless they took very specific (and manual) steps to reset HTML form field values. Version 1.3.0 contains a patch for this issue.

Affected products

• Mechanicalsoup Project Mechanicalsoup: before 1.3.0 (fixed in 1.3.0)

Published 2023-07-05. Last modified 2026-06-17.