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pyOpenSSL: TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback

🗓️ 09 Apr 2026 04:58:57Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 2 Views

Python OpenSSL flaw: unhandled exception in set_tlsext_servername_callback allows handshake to bypass server name indication controls.

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20 Jul 2026 00:40Current
6Medium risk
Vulners AI Score6
CVSS 3.15.3
CVSS 46.3
EPSS0.00241
SSVC
CWE-636
Python OpenSSLTLS handshakeserver name indicationunhandled exceptionsecurity controls bypassrestricted endpoints
2