UNKNOWN Microsoft

CVE-2025-66471

urllib3 Streaming API improperly handles highly compressed data

Microsoft Security Update 2025-Dec: urllib3 Streaming API improperly handles highly compressed data

Affected Products

cbl2 python-urllib3 1.26.19-2 on CBL Mariner 2.0
cbl2 python-virtualenv 20.26.6-2 on CBL Mariner 2.0
azl3 tensorflow 2.16.1-9 on Azure Linux 3.0
cbl2 python-urllib3 1.26.19-3 on CBL Mariner 2.0
azl3 python-urllib3 2.0.7-2 on Azure Linux 3.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-66471
https://nvd.nist.gov/vuln/detail/CVE-2025-66471

Published: 2025-12-09 · Source: Microsoft · Feed updated: 2026-08-10

This unknown severity vulnerability was published on 2025-12-09 via Microsoft. Affected: cbl2 python-urllib3 1.26.19-2 on CBL Mariner 2.0, cbl2 python-virtualenv 20.26.6-2 on CBL Mariner 2.0, azl3 tensorflow 2.16.1-9 on Azure Linux 3.0 and 2 more.

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