Allocation of Resources Without Limits or Throttling Affecting python3-tornado package, versions <0:6.5.8-0.el9_8.1


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.42% (35th percentile)

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  • Snyk IDSNYK-ALMALINUX9-PYTHON3TORNADO-20875272
  • published13 Oct 2026
  • disclosed14 Sept 2026

Introduced: 14 Sep 2026

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

How to fix?

Upgrade AlmaLinux:9 python3-tornado to version 0:6.5.8-0.el9_8.1 or higher.
This issue was patched in ALSA-2026:67146.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-tornado package and not the python3-tornado package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 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