Allocation of Resources Without Limits or Throttling Affecting python-tornado-doc package, versions <0:6.1.0-2.amzn2023.0.7


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.38% (30th percentile)

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  • Snyk IDSNYK-AMZN2023-PYTHONTORNADODOC-15921864
  • published7 Apr 2026
  • disclosed11 Mar 2026

Introduced: 11 Mar 2026

CVE-2026-31958  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 python-tornado-doc to version 0:6.1.0-2.amzn2023.0.7 or higher.
This issue was patched in ALAS2023-2026-1502.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-tornado-doc package and not the python-tornado-doc package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the max_body_size setting (default 100MB). Since parsing occurs synchronously on the main thread, this creates the possibility of denial-of-service due to the cost of parsing very large multipart bodies with many parts. This vulnerability is fixed in 6.5.5.

CVSS Base Scores

version 3.1