Tornado is a Python web framework and asynchronous networking library. The algorithm used for parsing HTTP cookies in Tornado versions prior to 6.4.2 sometimes has quadratic complexity, leading to excessive CPU consumption when parsing maliciously-crafted cookie headers. This parsing occurs in the event loop thread and may block the processing of other requests. Version 6.4.2 fixes the issue.

Tornado is a Python web framework and asynchronous networking library. The algorithm used for parsing HTTP cookies in Tornado versions prior to 6.4.2 sometimes has quadratic complexity, leading to excessive CPU consumption when parsing maliciously-crafted cookie headers. This parsing occurs in the event loop thread and may block the processing of other requests. Version 6.4.2 fixes the issue.

Tornado is a Python web framework and asynchronous networking library. The algorithm used for parsing HTTP cookies in Tornado versions prior to 6.4.2 sometimes has quadratic complexity, leading to excessive CPU consumption when parsing maliciously-crafted cookie headers. This parsing occurs in the event loop thread and may block the processing of other requests. Version 6.4.2 fixes the issue.

Tornado is a Python web framework and asynchronous networking library. ...

Security update for python-tornado6

Уязвимость python3-tornado

Important: python-tornado security update

Tornado has an HTTP cookie parsing DoS vulnerability

ELSA-2025-2872: pcs security update (IMPORTANT)

ELSA-2025-2471: pcs security update (IMPORTANT)

ELSA-2024-10590: python-tornado security update (IMPORTANT)

Уязвимость асинхронной сетевой библиотеки Tornado, связанная с неконтролируемым расходом ресурсов, позволяющая нарушителю вызвать отказ в обслуживании