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The vulnerability of the HTTP library Urllib3 in the Python programming language arises from incorrect processing of highly compressed input data, allowing attackers to cause service failures.

🗓️ 23 Mar 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 1 Views

Urllib3 Python vulnerability causes interruptions from incorrect processing of compressed input.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities in IBM Security QRadar EDR Software
11 Feb 202616:52
–ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite - Visual Inspection component uses urllib3 which is vulnerable to CVE-2025-66418 and CVE-2025-66471
6 Feb 202606:12
–ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite - Monitor Component uses urllib3-2.5.0-py3-none-any.whl which is vulnerable to CVE-2025-66418, CVE-2025-66471.
30 Jan 202606:04
–ibm
IBM Security Bulletins		Security Bulletin: IBM Cloud Pak for Data System (CPDS 1.0) is affected by multiple vulnerabilities due to urllib3
1 Apr 202610:31
–ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite uses multiple third party dependencies which is vulnerable to multiple CVEs.
30 Apr 202612:13
–ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite - Monitor Component uses urllib3-2.5.0-py3-none-any.whl, urllib3-2.6.1-py3-none-any.whl, urllib3-2.6.2-py3-none-any.whl which is vulnerable to CVE-2025-66418, CVE-2025-66471, CVE-2026-21441.
27 Feb 202611:41
–ibm
IBM Security Bulletins		Security Bulletin: High Resource Consumption Vulnerability in urllib3 Streaming API Due to Improper Handling of Highly Compressed Data (≤ v2.6.0) affects watsonx.data
8 Apr 202608:41
–ibm
IBM Security Bulletins		Security Bulletin: There is a vulnerability in urllib3-2.5.0-py3-none-any.whl used by IBM Maximo Manage application in IBM Maximo Application Suite (CVE-2025-66418)
2 Feb 202612:03
–ibm
IBM Security Bulletins		Security Bulletin: IBM Cloud Pak for Data System (CPDS 1.0) is affected by multiple vulnerabilities due to urllib3
1 Apr 202610:11
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerabilities in urllib3 affects IBM Netezza Appliance
16 Apr 202611:40
–ibm
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20 Apr 2026 00:00Current
7.2High risk
Vulners AI Score7.2
CVSS 27.8
CVSS 38.6
EPSS0.00633
urllib3 vulnerabilitypython vulnerabilityremote attackersinterruptionscompressed inputservice interruptions
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