vulnerability
Gentoo Linux: CVE-2021-28363: urllib3: Multiple vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:N/AC:L/Au:N/C:P/I:P/A:N) | Mar 15, 2021 | Jul 16, 2021 | Mar 31, 2026 |
Severity
6
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:N)
Published
Mar 15, 2021
Added
Jul 16, 2021
Modified
Mar 31, 2026
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.
Solutions
gentoo-linux-upgrade-dev-lang-pythongentoo-linux-upgrade-dev-python-pypy3gentoo-linux-upgrade-dev-python-urllib3
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.