Upstream information
Description
urllib3 is an HTTP client library for Python. From 1.26.0 until 2.8.0, the proxy_ssl_context, proxy_assert_hostname, proxy_assert_fingerprint, ssl_context, cert_reqs, verify_mode, use_forwarding_for_https=True, and CERT_NONE configuration paths fail to remain separated because target-server TLS settings are incorrectly applied to the HTTPS proxy connection. The trigger is that an application uses an HTTPS proxy and configures target-server TLS settings that must remain separate from the proxy TLS handshake, including HTTPS forwarding with target-specific identity or credentials. Applying cert_reqs=CERT_NONE can overwrite proxy_ssl_context.verify_mode in place, and the mutation persists so later connections reusing the same context may connect to the HTTPS proxy without certificate verification. The attack mechanism is that an attacker intercepts and impersonates the HTTPS proxy after the effective proxy policy accepts the attacker's certificate. The impact is that the attacker can observe or modify forwarded traffic or receive a target TLS client certificate, while CONNECT tunneling still preserves the separate end-to-end target TLS connection. 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 important severity.
| CVSS detail | SUSE |
|---|---|
| Base Score | 7.4 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | None |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 7.6 | 9.1 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/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:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Attack Requirements | Present | Present |
| Privileges Required | None | None |
| User Interaction | Passive | None |
| Vulnerable System Confidentiality Impact | High | High |
| Vulnerable System Integrity Impact | High | High |
| Vulnerable System Availability Impact | None | None |
| 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 | Not affected |
| SUSE Linux Enterprise Micro 5.3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Micro 5.4 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Micro 5.5 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | python-urllib3 | Not 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 | In progress |
| 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 | In progress |
| 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 | In progress |
| 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 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Public Cloud 12 | python-urllib3 | Not 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 | Not affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | python-urllib3 | Not 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 | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | python-urllib3 | Affected |
| SUSE Linux Enterprise Server 15 SP6 | python-urllib3 | Not 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 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | python-urllib3 | Not 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 | Not affected |
| SUSE CaaS Platform 3.0 | python-urllib3 | Not affected |
| SUSE CaaS Platform 4.0 | python-urllib3 | Not affected |
| SUSE Enterprise Storage 3 | python-urllib3 | Not affected |
| SUSE Enterprise Storage 4 | python-urllib3 | Not affected |
| SUSE Enterprise Storage 5 | python-urllib3 | Not affected |
| SUSE Enterprise Storage 6 | python-urllib3 | Not affected |
| SUSE Enterprise Storage 7 | python-urllib3 | Not affected |
| SUSE Enterprise Storage 7.1 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP1 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP4 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP5 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP6 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP6 | python-urllib3_1 | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 SP4 | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | python-urllib3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | python-urllib3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Micro 5.0 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Micro 5.1 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Micro 5.2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Python 2 15 SP1 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Python 2 15 SP2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Module for Python 2 15 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT | python-urllib3 | Not affected |
| SUSE Linux Enterprise Real Time 15 SP2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Real Time 15 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP2-BCL | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP2-ESPOS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP2-LTSS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP3-BCL | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP3-ESPOS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP3-LTSS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP4 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP4-ESPOS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 12 SP4-LTSS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 15 SP1 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 15 SP2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 15 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | python-urllib3 | Not affected |
| SUSE Linux Enterprise Workstation Extension 12 SP5 | python-urllib3 | Not affected |
| SUSE Manager Proxy 3.2 | python-urllib3 | Not affected |
| SUSE Manager Proxy 4.0 | python-urllib3 | Not affected |
| SUSE Manager Proxy 4.1 | python-urllib3 | Not affected |
| SUSE Manager Proxy 4.2 | python-urllib3 | Not affected |
| SUSE Manager Proxy 4.3 | python-urllib3 | Affected |
| SUSE Manager Proxy LTS 4.3 | python-urllib3 | Not affected |
| SUSE Manager Retail Branch Server 4.0 | python-urllib3 | Not affected |
| SUSE Manager Retail Branch Server 4.1 | python-urllib3 | Not affected |
| SUSE Manager Retail Branch Server 4.2 | python-urllib3 | Not affected |
| SUSE Manager Retail Branch Server 4.3 | python-urllib3 | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | python-urllib3 | Not affected |
| SUSE Manager Server 3.1 | python-urllib3 | Not affected |
| SUSE Manager Server 3.2 | python-urllib3 | Not affected |
| SUSE Manager Server 4.0 | python-urllib3 | Not affected |
| SUSE Manager Server 4.1 | python-urllib3 | Not affected |
| SUSE Manager Server 4.2 | python-urllib3 | Not affected |
| SUSE Manager Server 4.3 | python-urllib3 | Affected |
| SUSE Manager Server LTS 4.3 | python-urllib3 | Not affected |
| SUSE OpenStack Cloud 7 | python-urllib3 | Not affected |
| SUSE OpenStack Cloud 8 | python-urllib3 | Not affected |
| SUSE OpenStack Cloud 9 | python-urllib3 | Not affected |
| SUSE OpenStack Cloud Crowbar 8 | python-urllib3 | Not affected |
| SUSE OpenStack Cloud Crowbar 9 | python-urllib3 | Not affected |
| openSUSE Leap 15.3 | python-urllib3 | Not affected |
| openSUSE Leap 15.4 | python-urllib3 | Not affected |
| openSUSE Leap 15.5 | python-urllib3 | Not affected |
| openSUSE Leap 15.6 | python-urllib3 | Affected |
| openSUSE Leap 15.6 | python-urllib3_1 | Affected |
| openSUSE Leap Micro 5.2 | python-urllib3 | Not affected |
| openSUSE Leap Micro 5.3 | python-urllib3 | Not affected |
| openSUSE Leap Micro 5.4 | python-urllib3 | Not affected |
| openSUSE Leap Micro 5.5 | python-urllib3 | Not 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: Fri Oct 2 19:50:15 2026