UNKNOWN Microsoft
CVE-2026-27448
pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback
Microsoft Security Update 2026-Mar: pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback
Affected Products
- azl3 pyOpenSSL 24.2.1-1 on Azure Linux 3.0
- cbl2 pyOpenSSL 18.0.0-8 on CBL Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27448
- https://nvd.nist.gov/vuln/detail/CVE-2026-27448
This unknown severity vulnerability was published on 2026-03-10 via Microsoft. Affected: azl3 pyOpenSSL 24.2.1-1 on Azure Linux 3.0, cbl2 pyOpenSSL 18.0.0-8 on CBL Mariner 2.0.
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