Security Advisory

CVE-2021-28363

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2021-03-15 00:00:00

Last updated 2024-08-03 21:40:14

Assigner mitre

CVSS score not scored

State PUBLISHED

Description

The urllib3 library 1.26.x before 1.26.4 for Python omits SSL certificate validation in some cases involving HTTPS to HTTPS proxies. The initial connection to the HTTPS proxy (if an SSLContext isn't given via proxy_config) doesn't verify the hostname of the certificate. This means certificates for different servers that still validate properly with the default urllib3 SSLContext will be silently accepted.

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