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OESA-2026-1730 pyOpenSSL security update

🗓️ 27 Mar 2026 14:03:53Reported by GoogleType 
osv
 osv🔗 osv.dev👁 1 Views

PyOpenSSL security fixes: unhandled servername callback errors could bypass security; oversized cookies are now rejected.

Related
Refs
ReporterTitlePublishedViews
Family
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-2026-27459
17 Mar 202623:34
–attackerkb
ATTACKERKB		CVE-2026-27448
17 Mar 202623:24
–attackerkb
AlpineLinux		CVE-2026-27448
17 Mar 202623:24
–alpinelinux
AlpineLinux		CVE-2026-27459
17 Mar 202623:34
–alpinelinux
CBLMariner		CVE-2026-27448 affecting package pyOpenSSL for versions less than 24.2.1-2
25 Mar 202622:53
–cbl_mariner
CBLMariner		CVE-2026-27459 affecting package pyOpenSSL for versions less than 24.2.1-2
25 Mar 202622:53
–cbl_mariner
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27 Mar 2026 14:15Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.19.8
CVSS 49.2
EPSS0.00043
SSVC
servername callbackunhandled exceptionaccess control bypasscookie generationcookie size overflow
1