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.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| pyopenssl | — | 25.0.0-1ubuntu0.1 |
References
Similar Threats
- Critical ROOT-APP-PYPI-CVE-2026-27459
- Unknown RHSA-2026:7224
- Critical OESA-2026-1729
- Critical OESA-2026-1730
- Critical OESA-2026-1731
Exploit Protection
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