CVE-2021-28363

תיאור (מקור, אנגלית)

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.

מדדים

CVSS 3.1

6.5 (MEDIUM) מקור הציון: NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS — סבירות ניצול

2% (אחוזון 100) נכון ל-18/10/2026

CWE

CWE-295

מוצרים מושפעים

python: urllib3; fedoraproject: fedora; oracle: peoplesoft enterprise peopletools

קישורים

• https://github.com/urllib3/urllib3/commit/8d65ea1ecf6e2cdc27d42124e587c1b83a31‮… PatchThird Party Advisory
• https://github.com/urllib3/urllib3/commits/main PatchThird Party Advisory
• https://www.oracle.com/security-alerts/cpuoct2021.html PatchThird Party Advisory
• https://github.com/urllib3/urllib3/commit/8d65ea1ecf6e2cdc27d42124e587c1b83a31‮… PatchThird Party Advisory
• https://github.com/urllib3/urllib3/commits/main PatchThird Party Advisory
• https://www.oracle.com/security-alerts/cpuoct2021.html PatchThird Party Advisory
• https://github.com/urllib3/urllib3/security/advisories/GHSA-5phf-pp7p-vc2r MitigationThird Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorap‮…
• https://pypi.org/project/urllib3/1.26.4/ Third Party Advisory
• https://security.gentoo.org/glsa/202107-36 Third Party Advisory