pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback

🗓️ 19 Mar 2026 08:04:23Reported by MicrosoftType

pyOpenSSL allows TLS connection bypass due to an unhandled exception in set_tlsext_servername_callback.

Reporter	Title	Published	Views	Family All 89
IBM Security Bulletins	Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to a security bypass in pyOpenSSL [CVE-2026-27448, CVE-2026-27459]	21 May 202615:10	–	ibm
IBM Security Bulletins	Security Bulletin: pyOpenSSL TLS SNI Callback Exception Handling Flaw Allows Security Bypass	4 May 202612:18	–	ibm
IBM Security Bulletins	Security Bulletin: Multiple Vulnerabilities in pyOpenSSL bundled with IBM Fusion, IBM Fusion HCI, and IBM Fusion Data Cataloging	18 May 202622:19	–	ibm
IBM Security Bulletins	Security Bulletin: IBM SOAR QRadar Plugin App is vulnerable to using components with known vulnerabilities	6 May 202616:21	–	ibm
ATTACKERKB	CVE-2026-27448	17 Mar 202623:24	–	attackerkb
AlpineLinux	CVE-2026-27448	17 Mar 202623:24	–	alpinelinux
CBLMariner	CVE-2026-27448 affecting package pyOpenSSL for versions less than 24.2.1-2	25 Mar 202622:53	–	cbl_mariner
Chainguard	CVE-2026-27448 vulnerabilities	18 Mar 202601:17	–	cgr
CNNVD	pyOpenSSL 安全漏洞	17 Mar 202600:00	–	cnnvd
CVE	CVE-2026-27448	17 Mar 202623:24	–	cve