CVE-2026-27199 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2026-27199 Interim 1 1 2026-03-05T00:15:16Z current 2026-03-05T00:15:16Z 2026-03-05T00:15:16Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2026-27199 Werkzeug is a comprehensive WSGI web application library. Versions 3.1.5 and below, the safe_join function allows Windows device names as filenames if preceded by other path segments. This was previously reported as GHSA-hgf8-39gv-g3f2, but the added filtering failed to account for the fact that safe_join accepts paths with multiple segments, such as example/NUL. The function send_from_directory uses safe_join to safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely. This issue has been fixed in version 3.1.6. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://www.suse.com/support/security/rating/ SUSE Security Ratings SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Python 3 15 SP7 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Python 3 15 SP7 SUSE Linux Enterprise Module for Package Hub 15 SP7 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise Server 15 SP1-LTSS SUSE Linux Enterprise Server 15 SP2-LTSS SUSE Linux Enterprise Server 15 SP3-LTSS SUSE Linux Enterprise Server 15 SP4-LTSS SUSE Linux Enterprise Server 15 SP5-LTSS SUSE Linux Enterprise Server 15 SP6-LTSS SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Python 3 15 SP7 SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server Teradata 15 SP4 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Python 3 15 SP7 SUSE Linux Enterprise Server for SAP applications 16.0 openSUSE Leap 15.6 python-Werkzeug python2-Werkzeug python3-Werkzeug python311-Werkzeug python313-Werkzeug python3-Werkzeug as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python311-Werkzeug as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python-Werkzeug as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python3-Werkzeug as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS python311-Werkzeug as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS python-Werkzeug as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS python3-Werkzeug as a component of SUSE Linux Enterprise Module for Basesystem 15 SP7 python-Werkzeug as a component of SUSE Linux Enterprise Module for Basesystem 15 SP7 python2-Werkzeug as a component of SUSE Linux Enterprise Module for Package Hub 15 SP7 python-Werkzeug as a component of SUSE Linux Enterprise Module for Package Hub 15 SP7 python-Werkzeug as a component of SUSE Linux Enterprise Module for Public Cloud 12 python3-Werkzeug as a component of SUSE Linux Enterprise Module for Public Cloud 12 python311-Werkzeug as a component of SUSE Linux Enterprise Module for Python 3 15 SP7 python-Werkzeug as a component of SUSE Linux Enterprise Module for Python 3 15 SP7 python3-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP1-LTSS python-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP1-LTSS python3-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP2-LTSS python-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP2-LTSS python3-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP3-LTSS python-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP3-LTSS python3-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP4-LTSS python311-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP4-LTSS python-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP4-LTSS python3-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP5-LTSS python311-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP5-LTSS python-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP5-LTSS python3-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP6-LTSS python311-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP6-LTSS python-Werkzeug as a component of SUSE Linux Enterprise Server 15 SP6-LTSS python313-Werkzeug as a component of SUSE Linux Enterprise Server 16.0 python-Werkzeug as a component of SUSE Linux Enterprise Server 16.0 python-Werkzeug as a component of SUSE Linux Enterprise Server Teradata 15 SP4 python3-Werkzeug as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 python311-Werkzeug as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 python-Werkzeug as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 python3-Werkzeug as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 python311-Werkzeug as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 python-Werkzeug as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 python3-Werkzeug as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP6 python311-Werkzeug as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP6 python-Werkzeug as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP6 python313-Werkzeug as a component of SUSE Linux Enterprise Server for SAP applications 16.0 python-Werkzeug as a component of SUSE Linux Enterprise Server for SAP applications 16.0 python311-Werkzeug as a component of openSUSE Leap 15.6 python-Werkzeug as a component of openSUSE Leap 15.6 Werkzeug is a comprehensive WSGI web application library. Versions 3.1.5 and below, the safe_join function allows Windows device names as filenames if preceded by other path segments. This was previously reported as GHSA-hgf8-39gv-g3f2, but the added filtering failed to account for the fact that safe_join accepts paths with multiple segments, such as example/NUL. The function send_from_directory uses safe_join to safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely. This issue has been fixed in version 3.1.6. CVE-2026-27199 SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS:python-Werkzeug SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS:python3-Werkzeug SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS:python311-Werkzeug SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:python-Werkzeug SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:python3-Werkzeug SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:python311-Werkzeug SUSE Linux Enterprise Module for Basesystem 15 SP7:python-Werkzeug SUSE Linux Enterprise Module for Basesystem 15 SP7:python3-Werkzeug SUSE Linux Enterprise Module for Package Hub 15 SP7:python-Werkzeug SUSE Linux Enterprise Module for Package Hub 15 SP7:python2-Werkzeug SUSE Linux Enterprise Module for Public Cloud 12:python-Werkzeug SUSE Linux Enterprise Module for Public Cloud 12:python3-Werkzeug SUSE Linux Enterprise Module for Python 3 15 SP7:python-Werkzeug SUSE Linux Enterprise Module for Python 3 15 SP7:python311-Werkzeug SUSE Linux Enterprise Server 15 SP1-LTSS:python-Werkzeug SUSE Linux Enterprise Server 15 SP1-LTSS:python3-Werkzeug SUSE Linux Enterprise Server 15 SP2-LTSS:python-Werkzeug SUSE Linux Enterprise Server 15 SP2-LTSS:python3-Werkzeug SUSE Linux Enterprise Server 15 SP3-LTSS:python-Werkzeug SUSE Linux Enterprise Server 15 SP3-LTSS:python3-Werkzeug SUSE Linux Enterprise Server 15 SP4-LTSS:python-Werkzeug SUSE Linux Enterprise Server 15 SP4-LTSS:python3-Werkzeug SUSE Linux Enterprise Server 15 SP4-LTSS:python311-Werkzeug SUSE Linux Enterprise Server 15 SP5-LTSS:python-Werkzeug SUSE Linux Enterprise Server 15 SP5-LTSS:python3-Werkzeug SUSE Linux Enterprise Server 15 SP5-LTSS:python311-Werkzeug SUSE Linux Enterprise Server 15 SP6-LTSS:python-Werkzeug SUSE Linux Enterprise Server 15 SP6-LTSS:python3-Werkzeug SUSE Linux Enterprise Server 15 SP6-LTSS:python311-Werkzeug SUSE Linux Enterprise Server 16.0:python-Werkzeug SUSE Linux Enterprise Server 16.0:python313-Werkzeug SUSE Linux Enterprise Server Teradata 15 SP4:python-Werkzeug SUSE Linux Enterprise Server for SAP Applications 15 SP4:python-Werkzeug SUSE Linux Enterprise Server for SAP Applications 15 SP4:python3-Werkzeug SUSE Linux Enterprise Server for SAP Applications 15 SP4:python311-Werkzeug SUSE Linux Enterprise Server for SAP Applications 15 SP5:python-Werkzeug SUSE Linux Enterprise Server for SAP Applications 15 SP5:python3-Werkzeug SUSE Linux Enterprise Server for SAP Applications 15 SP5:python311-Werkzeug SUSE Linux Enterprise Server for SAP Applications 15 SP6:python-Werkzeug SUSE Linux Enterprise Server for SAP Applications 15 SP6:python3-Werkzeug SUSE Linux Enterprise Server for SAP Applications 15 SP6:python311-Werkzeug SUSE Linux Enterprise Server for SAP applications 16.0:python-Werkzeug SUSE Linux Enterprise Server for SAP applications 16.0:python313-Werkzeug openSUSE Leap 15.6:python-Werkzeug openSUSE Leap 15.6:python311-Werkzeug moderate 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L