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pip/urllib3urllib3: Decompression-bomb safeguards bypassed in parts of the streaming API

Risk 46
Severity
8.9
First published (updated )
CVE-2026-44432

pip/urllib3urllib3: Sensitive headers forwarded across origins in proxied low-level redirects

Risk 41
Severity
8.2
First published (updated )
CVE-2026-44431

pip/urllib3urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API)

Risk 33
Severity
8.9
EPSS
0.02%
First published (updated )
CVE-2026-21441

pypi/urllib3urllib3 Streaming API improperly handles highly compressed data

Risk 50
Severity
8.9
First published (updated )
CVE-2025-66471

pypi/urllib3urllib3 allows an unbounded number of links in the decompression chain

Risk 50
Severity
8.9
First published (updated )
CVE-2025-66418
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pip/urllib3urllib3 does not control redirects in browsers and Node.js

Risk 27
Severity
6.1
EPSS
0.01%
First published (updated )
CVE-2025-50182

pip/urllib3urllib3 redirects are not disabled when retries are disabled on PoolManager instantiation

Risk 27
Severity
6.1
EPSS
0.01%
First published (updated )
CVE-2025-50181

F5 BIG-IPProxy-Authorization request header isn't stripped during cross-origin redirects in urllib3

Risk 41
Severity
6.5
First published (updated )
CVE-2024-37891

IBM Business Automation InsightsRequest body not stripped after redirect in urllib3

Risk 27
Severity
4.2
First published (updated )
CVE-2023-45803

pip/urllib3Infoleak

Risk 40
Severity
6.1
First published (updated )
CVE-2018-25091
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Fedoraproject Fedora`Cookie` HTTP header isn't stripped on cross-origin redirects

Risk 64
Severity
8.1
First published (updated )
CVE-2023-43804

Oracle Instantis Enterprisetrackurllib3 is vulnerable to a denial of service, caused by a regular expression denial of service (ReDo…

Risk 46
Severity
7.5
First published (updated )
CVE-2021-33503

Canonical Ubuntu LinuxCRLF Injection

Risk 42
Severity
6.5
First published (updated )
CVE-2020-26137

Canonical Ubuntu LinuxLast updated 25 August 2025

Risk 46
Severity
7.5
First published (updated )
CVE-2019-11324

redhat/python-urllib3CRLF Injection

Risk 42
Severity
6.5
First published (updated )
CVE-2019-11236
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redhat/python-pipInfoleak

Risk 90
Severity
9.8
First published (updated )
CVE-2018-20060

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