HTTP Request Smuggling Affecting python3-tornado package, versions <4.5.3-150000.3.31.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.38% (30th percentile)

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  • Snyk IDSNYK-SLES155-PYTHON3TORNADO-20360532
  • published1 Oct 2026
  • disclosed30 Sept 2026

Introduced: 30 Sep 2026

NewCVE-2023-54397  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 python3-tornado to version 4.5.3-150000.3.31.1 or higher.

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 SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsing of Content-Length headers accepting non-standard characters. Attackers can send crafted HTTP requests with these characters to bypass proxy validation and smuggle requests when deployed behind certain proxies.

CVSS Base Scores

version 3.1