Upstream information
Description
urllib3 is an HTTP client library for Python. From 2.6.2 until 2.8.0, HTTPResponse.stream and HTTPResponse.read_chunked can enter an infinite loop because the Deflate decoder retains trailing bytes as unconsumed input after reaching end-of-stream and repeatedly decodes them without progress. The issue occurs when an untrusted server sends a chunked Deflate response whose decoded body exceeds a positive finite chunk size and whose encoded body has trailing bytes, specifically a response with Transfer-Encoding: chunked and Content-Encoding: deflate, content decoding enabled, and the positive finite amt=N streaming chunk size. The attack mechanism is that a malicious server returns a compressed chunked response with trailing bytes after the Deflate stream. The impact is excessive CPU usage and a request that does not complete, and network read timeouts do not interrupt the loop because no further socket read occurs. This issue is fixed in version 2.8.0.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | SUSE |
|---|---|
| Base Score | 5.3 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Low |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 6.9 | 6.9 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Attack Requirements | None | None |
| Privileges Required | None | None |
| User Interaction | None | None |
| Vulnerable System Confidentiality Impact | None | None |
| Vulnerable System Integrity Impact | None | None |
| Vulnerable System Availability Impact | Low | Low |
| Subsequent System Confidentiality Impact | None | None |
| Subsequent System Integrity Impact | None | None |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | python-urllib3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP7 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise High Performance Computing 12 | python-urllib3 | Affected |
| SUSE Linux Enterprise Micro 5.3 | python-urllib3 | Affected |
| SUSE Linux Enterprise Micro 5.4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Micro 5.5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise Server 15 SP7 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP7 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise Server 16.0 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 16.0 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise Server 16.1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 16.1 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | python-urllib3_1 | Affected |
| SUSE Linux Micro 6.0 | python-urllib3 | Affected |
| SUSE Linux Micro 6.1 | python-urllib3 | Affected |
| SUSE Linux Micro 6.2 | python-urllib3 | Affected |
| SUSE Multi-Linux Manager Client Tools for SLE 12 | venv-salt-minion | Not affected |
| SUSE Multi-Linux Manager Client Tools for SLE 15 | venv-salt-minion | Affected |
| SUSE Multi-Linux Manager Client Tools for SLE Micro 5 | venv-salt-minion | Affected |
| SUSE Multi-Linux Manager Client Tools for Ubuntu 2204 | venv-salt-minion | Not affected |
| SUSE Multi-Linux Manager Client Tools for Ubuntu 2404 | venv-salt-minion | Not affected |
| openSUSE Leap 16.0 | python-urllib3 | Affected |
| openSUSE Leap 16.0 | python-urllib3_1 | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 12 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Public Cloud 12 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP6 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP6 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise Server 12 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP6 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP6 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python-urllib3_1 | Affected |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python-urllib3_1 | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| HPE Helion OpenStack 8 | python-urllib3 | Affected |
| SUSE CaaS Platform 3.0 | python-urllib3 | Affected |
| SUSE CaaS Platform 4.0 | python-urllib3 | Affected |
| SUSE Enterprise Storage 3 | python-urllib3 | Affected |
| SUSE Enterprise Storage 4 | python-urllib3 | Affected |
| SUSE Enterprise Storage 5 | python-urllib3 | Affected |
| SUSE Enterprise Storage 6 | python-urllib3 | Affected |
| SUSE Enterprise Storage 7 | python-urllib3 | Affected |
| SUSE Enterprise Storage 7.1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | python-urllib3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | python-urllib3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP2 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | python-urllib3 | Affected |
| SUSE Linux Enterprise Micro 5.0 | python-urllib3 | Affected |
| SUSE Linux Enterprise Micro 5.1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Micro 5.2 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Python 2 15 SP1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Python 2 15 SP2 | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Python 2 15 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT | python-urllib3 | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | python-urllib3 | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP2-BCL | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP2-ESPOS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP2-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP3-BCL | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP3-ESPOS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP3-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP4-ESPOS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 12 SP4-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP2 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | python-urllib3 | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | python-urllib3 | Affected |
| SUSE Linux Enterprise Workstation Extension 12 SP5 | python-urllib3 | Affected |
| SUSE Manager Proxy 3.2 | python-urllib3 | Affected |
| SUSE Manager Proxy 4.0 | python-urllib3 | Affected |
| SUSE Manager Proxy 4.1 | python-urllib3 | Affected |
| SUSE Manager Proxy 4.2 | python-urllib3 | Affected |
| SUSE Manager Proxy 4.3 | python-urllib3 | Affected |
| SUSE Manager Proxy LTS 4.3 | python-urllib3 | Affected |
| SUSE Manager Retail Branch Server 4.0 | python-urllib3 | Affected |
| SUSE Manager Retail Branch Server 4.1 | python-urllib3 | Affected |
| SUSE Manager Retail Branch Server 4.2 | python-urllib3 | Affected |
| SUSE Manager Retail Branch Server 4.3 | python-urllib3 | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | python-urllib3 | Affected |
| SUSE Manager Server 3.1 | python-urllib3 | Affected |
| SUSE Manager Server 3.2 | python-urllib3 | Affected |
| SUSE Manager Server 4.0 | python-urllib3 | Affected |
| SUSE Manager Server 4.1 | python-urllib3 | Affected |
| SUSE Manager Server 4.2 | python-urllib3 | Affected |
| SUSE Manager Server 4.3 | python-urllib3 | Affected |
| SUSE Manager Server LTS 4.3 | python-urllib3 | Affected |
| SUSE OpenStack Cloud 7 | python-urllib3 | Affected |
| SUSE OpenStack Cloud 8 | python-urllib3 | Affected |
| SUSE OpenStack Cloud 9 | python-urllib3 | Affected |
| SUSE OpenStack Cloud Crowbar 8 | python-urllib3 | Affected |
| SUSE OpenStack Cloud Crowbar 9 | python-urllib3 | Affected |
| openSUSE Leap 15.3 | python-urllib3 | Affected |
| openSUSE Leap 15.4 | python-urllib3 | Affected |
| openSUSE Leap 15.5 | python-urllib3 | Affected |
| openSUSE Leap 15.6 | python-urllib3 | Affected |
| openSUSE Leap 15.6 | python-urllib3_1 | Affected |
| openSUSE Leap Micro 5.2 | python-urllib3 | Affected |
| openSUSE Leap Micro 5.3 | python-urllib3 | Affected |
| openSUSE Leap Micro 5.4 | python-urllib3 | Affected |
| openSUSE Leap Micro 5.5 | python-urllib3 | Affected |
| Products at an unknown state of their lifecycle. | ||
| Products | saltbundlepy-urllib3 | Affected |
| Products | venv-salt-minion | Affected |
| SUSE Linux Enterprise Server for NVIDIA 16.1 | python-urllib3 | Affected |
| SUSE Linux Enterprise Server for NVIDIA 16.1 | python-urllib3_1 | Affected |
| SUSE Multi Linux Manager Tools EL-8 | venv-salt-minion | Not affected |
| SUSE Multi Linux Manager Tools EL-9 | venv-salt-minion | Not affected |
| SUSE Multi Linux Manager Tools RES-7 | venv-salt-minion | Not affected |
| SUSE Multi Linux Manager Tools SLE-12 | venv-salt-minion | Not affected |
| SUSE Multi Linux Manager Tools SLE-15 | venv-salt-minion | Affected |
| SUSE Multi Linux Manager Tools SLE-Micro-5 | venv-salt-minion | Affected |
| SUSE Multi Linux Manager Tools Ubuntu-22.04 | venv-salt-minion | Not affected |
| SUSE Multi Linux Manager Tools Ubuntu-24.04 | venv-salt-minion | Not affected |
| SUSE Multi-Linux Manager Client Tools for SUSE Liberty Linux 7, RHEL and clones | venv-salt-minion | Not affected |
| SUSE Multi-Linux Manager Client Tools for SUSE Liberty Linux 8, RHEL and clones | venv-salt-minion | Not affected |
| SUSE Multi-Linux Manager Client Tools for SUSE Liberty Linux 9, RHEL and clones | venv-salt-minion | Not affected |
SUSE Timeline for this CVE
CVE page created: Thu Oct 1 14:52:11 2026CVE page last modified: Thu Oct 1 18:51:14 2026