CVE-2021-3116: Proxy.py Project Proxy.py

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

before_upstream_connection in AuthPlugin in http/proxy/auth.py in proxy.py before 2.3.1 accepts incorrect Proxy-Authorization header data because of a boolean confusion (and versus or).

Affected products

• Proxy.py Project Proxy.py: before 2.3.1 (fixed in 2.3.1)

Published 2021-01-11. Last modified 2026-06-17.