CVE-2023-45813: Torbot Project Torbot

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Torbot is an open source tor network intelligence tool. In affected versions the `torbot.modules.validators.validate_link function` uses the python-validators URL validation regex. This particular regular expression has an exponential complexity which allows an attacker to cause an application crash using a well-crafted argument. An attacker can use a well-crafted URL argument to exploit the vulnerability in the regular expression and cause a Denial of Service on the system. The validators file has been removed in version 4.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

• Torbot Project Torbot: before 4.0.0 (fixed in 4.0.0)
• Validators Project Validators: version 0.11.0 only; version 0.20.0 only

Published 2023-10-18. Last modified 2026-06-17.