Resource exhaustion in urllib3 - CVE-2025-66471

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU119231

Resource exhaustion in urllib3 - CVE-2025-66471

Published: December 5, 2025 / Updated: February 17, 2026


Vulnerability identifier: #VU119231
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-66471
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the streaming API does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.


Affected software

urllib3
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Micro
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Public Cloud Module
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP Applications
Basesystem Module
Python 3 Module
openSUSE Leap
openEuler
Ubuntu
Fusion Content-Aware Storage
Storage Sentinel Anomaly Scan Engine
Financial Transaction Manager for RedHat OpenShift
Security QRadar EDR
watsonx Code Assistant On Prem
Storage Scale
watsonx.data integration
Maximo Application Suite - IoT Component
Maximo Application Suite - Monitor Component
Maximo Application Suite - Edge Data Collector
Maximo Application Suite - Visual Inspection Component
Maximo Application Suite Ai Service
QRadar App SDK
Data Cataloging
Maximo Application Suite - Location Service for Esri Component
IBM Cloud Pak for Data System
cert-manager Operator for Red Hat OpenShift
IBM Fusion HCI
IBM Watson Speech Services Cartridge for IBM Cloud Pak for Data
IBM Watson Discovery for IBM Cloud Pak for Data
IBM Sterling Control Center
IBM Maximo Application Suite
Ansible Automation Platform
IBM Maximo Application Suite - Manage Component
Red Hat OpenStack
watsonx.data
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
python-s3transfer (Red Hat package)
python3.11-galaxy-importer (Red Hat package)
automation-eda-controller (Red Hat package)
receptor (Red Hat package)
python-urllib3 (Red Hat package)
python3-urllib3
python-urllib3 (Ubuntu package)
python-urllib3
python2-urllib3
python3.11-urllib3 (Red Hat package)
python3.11-urllib3
python3.12-urllib3 (Red Hat package)
python311-urllib3_1
python3-urllib3-doc
python3.11-botocore (Red Hat package)
python311-urllib3
python313-urllib3
automation-gateway (Red Hat package)
ansible-automation-platform-installer (Red Hat package)
automation-platform-ui (Red Hat package)
python3.11-django-ansible-base (Red Hat package)
ansible-core (Red Hat package)
python3.11-requests (Red Hat package)
python3.11-pulpcore (Red Hat package)
resource-agents (Red Hat package)
fence-agents (Red Hat package)
python3.11-django (Red Hat package)
python-django (Red Hat package)
automation-controller (Red Hat package)
resource-agents-aliyun
resource-agents-gcp
resource-agents
resource-agents-paf
automation-hub (Red Hat package)
python3.11-galaxy-ng (Red Hat package)
python3.11-protobuf (Red Hat package)
python-pip (Ubuntu package)
python-pip-wheel
python3-pip
ansible-lint (Red Hat package)
ansible-dev-tools (Red Hat package)
ansible-navigator (Red Hat package)
IBM InfoSphere Information Server
Juniper Junos Space

How to mitigate CVE-2025-66471

Install updates from vendor's website.

urllib3 - update to 2.6.0
Fusion Content-Aware Storage - update to 1.1.3
IBM Cloud Pak for Data System - update to 1.0.10.0
Storage Sentinel Anomaly Scan Engine - update to 2.3.0
cert-manager Operator for Red Hat OpenShift - update to 1.18.1
watsonx.data - update to 2.3.1
IBM Fusion HCI - update to 2.13.0
Security QRadar EDR - update to 3.12.24
IBM Watson Speech Services Cartridge for IBM Cloud Pak for Data - update to 5.3.1
IBM Watson Discovery for IBM Cloud Pak for Data - update to 5.3.1
watsonx Code Assistant On Prem - update to 5.3.0
Storage Scale - addressed in versions 5.2.3.7, 6.0.0.2
watsonx.data integration - update to 5.3.1
IBM Sterling Control Center - addressed in versions 6.3.1.0.7, 6.4.1.0.1, 6.4.2.0.1
Maximo Application Suite - IoT Component - addressed in versions 8.7.30, 8.8.26, 9.0.16, 9.1.7
Maximo Application Suite - Monitor Component - addressed in versions 8.10.27, 8.11.25, 9.0.17, 9.1.7
IBM Maximo Application Suite - addressed in versions 8.10.36, 8.11.33, 9.0.22, 9.1.11
Maximo Application Suite - Edge Data Collector - addressed in versions 8.11.25, 9.0.17, 9.1.7
Maximo Application Suite - Visual Inspection Component - addressed in versions 9.0.16, 9.1.6
Maximo Application Suite Ai Service - update to 9.1.10
IBM InfoSphere Information Server - update to 11.7.1.6 Service pack 1
python-s3transfer (Red Hat package) - update to 0.1.13-1.el7_9.5
python3.11-galaxy-importer (Red Hat package) - addressed in versions 0.4.37-2.el8ap, 0.4.37-2.el9ap
automation-eda-controller (Red Hat package) - update to 1.2.4-1.el9ap
receptor (Red Hat package) - addressed in versions 1.6.3-1.el8ap, 1.6.3-1.el9ap, 1.6.3-2.el9ap, 1.6.3-2.el10ap
python-urllib3 (Red Hat package) - addressed in versions 1.10.2-3.el6_10.1, 1.10.2-7.el7_9.1, 1.24.2-5.el8_4.1, 1.24.2-5.el8_6.4, 1.24.2-5.el8_8.3, 1.24.2-9.el8_10, 1.26.5-3.el8ost.3, 1.26.5-3.el9_0.2, 1.26.5-3.el9_2.3, 1.26.5-5.el9_4.3, 1.26.5-6.el9_6.1, 1.26.5-6.el9_7.1, 1.26.19-2.el10_0.1, 1.26.19-2.el10_1.1
python3-urllib3 - addressed in versions 1.24.2-9, 1.26.19-5
python-urllib3 (Ubuntu package) - addressed in versions 1.25.8-2ubuntu0.4+esm2, 1.26.5-1~exp1ubuntu0.4, 2.0.7-1ubuntu0.3, 2.0.7-1ubuntu0.5, 2.0.7-1ubuntu0.6, 2.3.0-2ubuntu0.2, 2.3.0-2ubuntu0.4, 2.3.0-2ubuntu0.5, 2.3.0-3ubuntu0.1, 2.3.0-3ubuntu0.3, 2.3.0-3ubuntu0.4
python3-urllib3 - addressed in versions 1.25.9-14, 1.26.12-11, 1.26.18-5, 1.26.18-6
python-urllib3 - addressed in versions 1.25.9-14, 1.26.12-11, 1.26.18-5, 1.26.18-6
python2-urllib3 - update to 1.25.9-14
python-urllib3 - update to 1.25.10-3.48.4
python3-urllib3 - addressed in versions 1.25.10-3.48.4, 1.25.10-150300.4.21.1, 1.25.10-150300.4.24.1, 1.25.10-150300.4.30.1
python3.11-urllib3 (Red Hat package) - addressed in versions 1.26.12-1.el8_8.3, 1.26.12-1.el9_2.2, 1.26.12-2.el9_4.3, 1.26.12-5.el9_6.1, 1.26.12-5.el9_7.1, 1.26.12-6.el8_10, 2.6.3-1.el8ap, 2.6.3-1.el9ap
python3.11-urllib3 - update to 1.26.12-6
python3.12-urllib3 (Red Hat package) - addressed in versions 1.26.18-2.el9_4.2, 1.26.19-1.el9_6.1, 1.26.19-1.el9_7.1, 1.26.19-2.el8_10
python311-urllib3_1 - update to 1.26.18-150600.3.6.1
python3-urllib3-doc - update to 1.26.19-5
python3.11-botocore (Red Hat package) - addressed in versions 1.34.162-1.el8ap, 1.34.162-1.el9ap
python311-urllib3 - update to 2.0.7-150400.7.27.1
QRadar App SDK - update to 2.2.5
Ansible Automation Platform - addressed in versions 2.4, 2.5, 2.6
python313-urllib3 - update to 2.5.0-160000.5.1
Data Cataloging - update to 2.5.3
automation-gateway (Red Hat package) - addressed in versions 2.5.20260121-1.el8ap, 2.5.20260121-1.el9ap, 2.6.20260121-1.el9ap
ansible-automation-platform-installer (Red Hat package) - update to 2.6-4.el9ap
automation-platform-ui (Red Hat package) - update to 2.6.5-1.el9ap
python3.11-django-ansible-base (Red Hat package) - update to 2.6.20260121-1.el9ap
ansible-core (Red Hat package) - addressed in versions 2.16.15-1.el8ap, 2.16.15-1.el9ap, 2.16.15-2.el10ap
python3.11-requests (Red Hat package) - addressed in versions 2.31.0-3.el8ap, 2.31.0-3.el9ap
python3.11-pulpcore (Red Hat package) - update to 3.49.49-1.el9ap
resource-agents (Red Hat package) - addressed in versions 4.1.1-61.el7_9.22, 4.1.1-90.el8_4.22, 4.9.0-16.el8_6.19, 4.9.0-40.el8_8.15, 4.9.0-54.el8_10.27
fence-agents (Red Hat package) - addressed in versions 4.2.1-65.el8_4.25, 4.2.1-89.el8_6.20, 4.2.1-112.el8_8.15, 4.10.0-20.el9_0.27, 4.10.0-43.el9_2.18, 4.10.0-62.el9_4.21, 4.10.0-86.el9_6.14
python3.11-django (Red Hat package) - addressed in versions 4.2.27-1.el8ap, 4.2.27-1.el9ap, 4.2.27-2.el9ap
python-django (Red Hat package) - update to 4.2.27-2.el10ap
automation-controller (Red Hat package) - addressed in versions 4.5.30-1.el8ap, 4.5.30-1.el9ap, 4.6.25-1.el8ap, 4.6.25-1.el9ap, 4.7.8-1.el9ap
resource-agents-aliyun - update to 4.9.0-54
resource-agents-gcp - update to 4.9.0-54
resource-agents - update to 4.9.0-54
resource-agents-paf - update to 4.9.0-54
automation-hub (Red Hat package) - addressed in versions 4.10.11-1.el8ap, 4.10.11-1.el9ap, 4.11.5-1.el9ap
python3.11-galaxy-ng (Red Hat package) - addressed in versions 4.10.11-2.el8ap, 4.10.11-2.el9ap, 4.11.5-1.el9ap
python3.11-protobuf (Red Hat package) - update to 4.25.8-1.el9ap
IBM Maximo Application Suite - Manage Component - addressed in versions 8.6.34, 8.7.28, 9.0.21, 9.1.8
Maximo Application Suite - Location Service for Esri Component - addressed in versions 9.0.6, 9.1.5
Red Hat OpenStack - update to 17.1
python-pip (Ubuntu package) - addressed in versions 22.0.2+dfsg-1ubuntu0.7+esm1, 22.0.2+dfsg-1ubuntu0.7+esm2, 22.0.2+dfsg-1ubuntu0.7+esm3, 24.0+dfsg-1ubuntu1.3+esm1, 24.0+dfsg-1ubuntu1.3+esm2, 24.0+dfsg-1ubuntu1.3+esm3, 25.1.1+dfsg-1ubuntu2+esm1, 25.1.1+dfsg-1ubuntu2+esm2, 25.1.1+dfsg-1ubuntu2+esm3
python-pip-wheel - update to 23.3.1-6
python3-pip - update to 23.3.1-6
Juniper Junos Space - update to 26.1R1 Patch V1
ansible-lint (Red Hat package) - addressed in versions 26.1.0-1.el8ap, 26.1.0-1.el9ap, 26.1.0-2.el9ap, 26.1.0-2.el10ap
ansible-dev-tools (Red Hat package) - addressed in versions 26.1.0-1.el8ap, 26.1.0-1.el9ap, 26.1.0-2.el9ap, 26.1.0-2.el10ap
ansible-navigator (Red Hat package) - addressed in versions 26.1.1-1.el8ap, 26.1.1-1.el9ap, 26.1.1-2.el9ap, 26.1.1-2.el10ap

External References

Related Security Bulletins