VYPR
High severityNVD Advisory· Published Nov 22, 2024· Updated Nov 3, 2025

Tornado has HTTP cookie parsing DoS vulnerability

CVE-2024-52804

Description

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
tornadoPyPI
< 6.4.26.4.2

Affected products

36

Patches

Vulnerability mechanics

References

6

News mentions

0

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