CVE-2026-39892

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.

If a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. `Hash.update()`), this could lead to buffer overflows. For example: ```python h = Hash(SHA256()) b.update(buf[::-1]) ``` would read past the end of the buffer on Python >3.11

cryptography es un paquete diseñado para exponer primitivas criptográficas y recetas a desarrolladores de Python. Desde la versión 45.0.0 hasta antes de la 46.0.7, si se pasaba un búfer no contiguo a APIs que aceptaban búferes de Python (por ejemplo, Hash.update()), esto podría llevar a desbordamientos de búfer. Esta vulnerabilidad está corregida en la versión 46.0.7.