| Package | Affected versions | Patched versions |
|---|---|---|
| pyopenssl | ≥ 0.14, < 26.0.0≥ 0.14.0, < 26.0.0 | 26.0.0 |
| pyopenssl | ≥ 0.14, < 26.0.0 | 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.
Unhandled exceptions now result in rejecting the connection.
Credit to Leury Castillo for reporting this issue.
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free