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Affected Component
Analysis
python3-pyopenssl
Patched
Name
CVE-2026-27459
Description
pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer. Starting in version 26.0.0, cookie values that are too long are now rejected.
CWEs
Published Date
Updated Date
Workaround
-
Analysis#
Vulnerability Ratings#
7.2
CVSSv4
9.8
CVSSv31
NaN
other
Others affected components#
Resolved with patches#
python3-pyopenssl (yocto:kirkstone)
#
Title
Author
Resolve
1
Fix buffer overflow in DTLS cookie generation callback
Alex Gaynor <alex.gaynor@gmail.com>
CVE-2026-27459
python3-pyopenssl (yocto:scarthgap)
#
Title
Author
Resolve
1
Fix buffer overflow in DTLS cookie generation callback
Alex Gaynor <alex.gaynor@gmail.com>
CVE-2026-27459