Information Exposure Affecting python-tornado package, versions <0:4.2.1-3.amzn2.0.6


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.45% (37th percentile)

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  • Snyk IDSNYK-AMZN2-PYTHONTORNADO-18523692
  • published5 Aug 2026
  • disclosed14 Jul 2026

Introduced: 14 Jul 2026

CVE-2026-49853  (opens in a new tab)
CWE-201  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 python-tornado to version 0:4.2.1-3.amzn2.0.6 or higher.
This issue was patched in ALAS2-2026-3847.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-tornado package and not the python-tornado package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed only the Host header, leaving Authorization, auth_username, auth_password, and auth_mode in place when a redirect changed scheme, host, or port. This issue is fixed in version 6.5.6.

CVSS Base Scores

version 3.1