RUSTSEC-2026-0098: Name constraints for URI names were incorrectly accepted

| Details | |
| --- | --- |
| Package | `rustls-webpki` |
| Version | `0.101.7` |
| URL | n/a |
| Patched Versions | >=0.103.12, <0.104.0-alpha.1 OR >=0.104.0-alpha.6 |
| Aliases | [GHSA-965h-392x-2mh5](https://github.com/advisories/GHSA-965h-392x-2mh5) |

Name constraints for URI names were ignored and therefore accepted.

Note this library does not provide an API for asserting URI names, and URI name constraints are otherwise not implemented. URI name constraints are now rejected unconditionally.

Since name constraints are restrictions on otherwise properly-issued certificates, this bug is reachable only after signature verification and requires misissuance to exploit.

This vulnerability is identified as [GHSA-965h-392x-2mh5](https://github.com/rustls/webpki/security/advisories/GHSA-965h-392x-2mh5). Thank you to [@1seal](https://github.com/1seal) for the report.

Revisa cómo el repositorio declara la dependencia rustls-webpki y compara su versión con las versiones corregidas indicadas en este issue. Empieza comprobando los metadatos de la dependencia y las pruebas de validación existentes; la tarea está terminada cuando la versión vulnerable 0.101.7 ya no se selecciona y las comprobaciones relevantes pasan correctamente.

Escrito por el modelo de indexación a partir del texto del issue.