Improper Handling of Highly Compressed Data (Data Amplification) Affecting python311-tornado6 package, versions <6.3.2-150400.9.18.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.57% (47th percentile)

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  • Snyk IDSNYK-SLES155-PYTHON311TORNADO6-17807859
  • published3 Jul 2026
  • disclosed2 Jul 2026

Introduced: 2 Jul 2026

CVE-2026-49855  (opens in a new tab)
CWE-409  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 python311-tornado6 to version 6.3.2-150400.9.18.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python311-tornado6 package and not the python311-tornado6 package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, Tornado gzip decompression routines processed limited-size chunks but did not enforce an overall limit on accumulated decompressed chunks, allowing a malicious server accessed by SimpleAsyncHTTPClient or an HTTPServer configured with decompress_request=True to consume effectively unlimited memory. This issue is fixed in version 6.5.6.

CVSS Base Scores

version 3.1