Allocation of Resources Without Limits or Throttling Affecting python-tornado-debugsource package, versions <0:6.1.0-2.amzn2023.0.11


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.42% (35th percentile)

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  • Snyk IDSNYK-AMZN2023-PYTHONTORNADODEBUGSOURCE-20851638
  • published13 Oct 2026
  • disclosed15 Sept 2026

Introduced: 15 Sep 2026

CVE-2026-91990  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 python-tornado-debugsource to version 0:6.1.0-2.amzn2023.0.11 or higher.
This issue was patched in ALAS2023-2026-3177.

NVD Description

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

Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data that splits multipart data before validating the max_parts limit. Attackers can send crafted multipart requests with many parts to create large transient lists, exhausting server memory and causing denial of service.

CVSS Base Scores

version 3.1