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Affected Component
Analysis
python3-pyopenssl
Patched
Name
CVE-2026-27448
Description
pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user provided callback to `set_tlsext_servername_callback` raised an unhandled exception, this would result in a connection being accepted. If a user was relying on this callback for any security-sensitive behavior, this could allow bypassing it. Starting in version 26.0.0, unhandled exceptions now result in rejecting the connection.
CWEs
Published Date
Updated Date
Workaround
-
Analysis#
Vulnerability Ratings#
1.7
CVSSv4
5.3
CVSSv31
NaN
other
Others affected components#
Resolved with patches#
python3-pyopenssl (yocto:kirkstone)
#
Title
Author
Resolve
1
Handle exceptions in set_tlsext_servername_callback callbacks
Alex Gaynor <alex.gaynor@gmail.com>
CVE-2026-27448
python3-pyopenssl (yocto:scarthgap)
#
Title
Author
Resolve
1
Handle exceptions in set_tlsext_servername_callback callbacks
Alex Gaynor <alex.gaynor@gmail.com>
CVE-2026-27448