Em resumo
- CVE-2026-27448 é uma vulnerabilidade MÉDIO (CVSS 5.3) que afeta pyopenssl, pyopenssl (pyopenssl).
- Chance de exploração nos próximos 30 dias (EPSS): 0.25%, maior que 16.5% das vulnerabilidades.
- Correção: atualize para 26.0.0 ou posterior.
| Package | Affected versions | Patched versions |
|---|
| pyopenssl PyPI | ≥ 0.14, < 26.0.0≥ 0.14.0, < 26.0.0
| 26.0.0
|
| pyopenssl | ≥ 0.14, < 26.0.0
| 26.0.0
|
Description
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.
Unhandled exceptions now result in rejecting the connection.
Credit to Leury Castillo for reporting this issue.
NVD 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.
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