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Search Parameters:
  • Results Type: Overview
  • Keyword (text search): cpe:2.3:a:python:urllib3:1.26.1:*:*:*:*:*:*:*
  • CPE Name Search: true
There are 2 matching records.
Displaying matches 1 through 2.
Vuln ID Summary CVSS Severity
CVE-2021-33503

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

Published: June 29, 2021; 7:15:07 AM -0400
V3.1: 7.5 HIGH
V2.0: 5.0 MEDIUM
CVE-2021-28363

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.

Published: March 15, 2021; 2:15:19 PM -0400
V3.1: 6.5 MEDIUM
V2.0: 6.4 MEDIUM