CVE-2025-47278 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2025-47278 Interim 1 4 2026-03-05T00:33:24Z current 2025-05-14T23:12:13Z 2026-03-05T00:33:24Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2025-47278 Flask is a web server gateway interface (WSGI) web application framework. In Flask 3.1.0, the way fallback key configuration was handled resulted in the last fallback key being used for signing, rather than the current signing key. Signing is provided by the `itsdangerous` library. A list of keys can be passed, and it expects the last (top) key in the list to be the most recent key, and uses that for signing. Flask was incorrectly constructing that list in reverse, passing the signing key first. Sites that have opted-in to use key rotation by setting `SECRET_KEY_FALLBACKS` care likely to unexpectedly be signing their sessions with stale keys, and their transition to fresher keys will be impeded. Sessions are still signed, so this would not cause any sort of data integrity loss. Version 3.1.1 contains a patch for the issue. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/RQFGSNWSLQGT7NEERPR5OR67EM4FTVPJ/ E-Mail link for openSUSE-SU-2025:15152-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings SLES-LTSS-TERADATA 15 SP2 SUSE Linux Enterprise Module for Python 3 15 SP6 SUSE Linux Enterprise Module for Python 3 15 SP7 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS SUSE Linux Enterprise Module for Python 3 15 SP6 SUSE Linux Enterprise Module for Python 3 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 Module for Python 3 15 SP6 SUSE Linux Enterprise Module for Python 3 15 SP7 SUSE Linux Enterprise Server 15-LTSS 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 SP3 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP5 SUSE Linux Enterprise Module for Python 3 15 SP6 SUSE Linux Enterprise Module for Python 3 15 SP7 openSUSE Leap 15.6 openSUSE Tumbleweed python-Flask python3-Flask python311-Flask python311-Flask-3.1.1-1.1 python311-Flask-doc python311-Flask-doc-3.1.1-1.1 python312-Flask-3.1.1-1.1 python312-Flask-doc-3.1.1-1.1 python313-Flask-3.1.1-1.1 python313-Flask-3.1.1-160000.2.2 python313-Flask-doc-3.1.1-1.1 python313-Flask-doc-3.1.1-160000.2.2 python313-Flask-3.1.1-160000.2.2 as a component of SUSE Linux Enterprise Server 16.0 python313-Flask-doc-3.1.1-160000.2.2 as a component of SUSE Linux Enterprise Server 16.0 python311-Flask-3.1.1-1.1 as a component of openSUSE Tumbleweed python311-Flask-doc-3.1.1-1.1 as a component of openSUSE Tumbleweed python312-Flask-3.1.1-1.1 as a component of openSUSE Tumbleweed python312-Flask-doc-3.1.1-1.1 as a component of openSUSE Tumbleweed python313-Flask-3.1.1-1.1 as a component of openSUSE Tumbleweed python313-Flask-doc-3.1.1-1.1 as a component of openSUSE Tumbleweed python-Flask as a component of SLES-LTSS-TERADATA 15 SP2 python3-Flask as a component of SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS python-Flask as a component of SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS python311-Flask as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python-Flask as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python311-Flask as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS python-Flask as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS python311-Flask as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS python-Flask as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS python-Flask as a component of SUSE Linux Enterprise Module for Public Cloud 12 python3-Flask as a component of SUSE Linux Enterprise Module for Public Cloud 12 python311-Flask as a component of SUSE Linux Enterprise Module for Python 3 15 SP6 python-Flask as a component of SUSE Linux Enterprise Module for Python 3 15 SP6 python311-Flask as a component of SUSE Linux Enterprise Module for Python 3 15 SP7 python-Flask as a component of SUSE Linux Enterprise Module for Python 3 15 SP7 python3-Flask as a component of SUSE Linux Enterprise Server 15 SP1-LTSS python-Flask as a component of SUSE Linux Enterprise Server 15 SP1-LTSS python3-Flask as a component of SUSE Linux Enterprise Server 15 SP2-LTSS python-Flask as a component of SUSE Linux Enterprise Server 15 SP2-LTSS python3-Flask as a component of SUSE Linux Enterprise Server 15 SP3-LTSS python-Flask as a component of SUSE Linux Enterprise Server 15 SP3-LTSS python311-Flask as a component of SUSE Linux Enterprise Server 15 SP4-LTSS python-Flask as a component of SUSE Linux Enterprise Server 15 SP4-LTSS python311-Flask as a component of SUSE Linux Enterprise Server 15 SP5-LTSS python-Flask as a component of SUSE Linux Enterprise Server 15 SP5-LTSS python3-Flask as a component of SUSE Linux Enterprise Server 15-LTSS python-Flask as a component of SUSE Linux Enterprise Server 15-LTSS python-Flask as a component of SUSE Linux Enterprise Server Teradata 15 SP4 python3-Flask as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP3 python-Flask as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP3 python311-Flask as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 python-Flask as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 python311-Flask as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 python-Flask as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 python311-Flask as a component of openSUSE Leap 15.6 python311-Flask-doc as a component of openSUSE Leap 15.6 python-Flask as a component of openSUSE Leap 15.6 Flask is a web server gateway interface (WSGI) web application framework. In Flask 3.1.0, the way fallback key configuration was handled resulted in the last fallback key being used for signing, rather than the current signing key. Signing is provided by the `itsdangerous` library. A list of keys can be passed, and it expects the last (top) key in the list to be the most recent key, and uses that for signing. Flask was incorrectly constructing that list in reverse, passing the signing key first. Sites that have opted-in to use key rotation by setting `SECRET_KEY_FALLBACKS` care likely to unexpectedly be signing their sessions with stale keys, and their transition to fresher keys will be impeded. Sessions are still signed, so this would not cause any sort of data integrity loss. Version 3.1.1 contains a patch for the issue. CVE-2025-47278 SUSE Linux Enterprise Server 16.0:python313-Flask-3.1.1-160000.2.2 SUSE Linux Enterprise Server 16.0:python313-Flask-doc-3.1.1-160000.2.2 openSUSE Tumbleweed:python311-Flask-3.1.1-1.1 openSUSE Tumbleweed:python311-Flask-doc-3.1.1-1.1 openSUSE Tumbleweed:python312-Flask-3.1.1-1.1 openSUSE Tumbleweed:python312-Flask-doc-3.1.1-1.1 openSUSE Tumbleweed:python313-Flask-3.1.1-1.1 openSUSE Tumbleweed:python313-Flask-doc-3.1.1-1.1 SLES-LTSS-TERADATA 15 SP2:python-Flask SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS:python-Flask SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS:python3-Flask SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS:python-Flask SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS:python311-Flask SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:python-Flask SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:python311-Flask SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:python-Flask SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:python311-Flask SUSE Linux Enterprise Module for Public Cloud 12:python-Flask SUSE Linux Enterprise Module for Public Cloud 12:python3-Flask SUSE Linux Enterprise Module for Python 3 15 SP6:python-Flask SUSE Linux Enterprise Module for Python 3 15 SP6:python311-Flask SUSE Linux Enterprise Module for Python 3 15 SP7:python-Flask SUSE Linux Enterprise Module for Python 3 15 SP7:python311-Flask SUSE Linux Enterprise Server 15 SP1-LTSS:python-Flask SUSE Linux Enterprise Server 15 SP1-LTSS:python3-Flask SUSE Linux Enterprise Server 15 SP2-LTSS:python-Flask SUSE Linux Enterprise Server 15 SP2-LTSS:python3-Flask SUSE Linux Enterprise Server 15 SP3-LTSS:python-Flask SUSE Linux Enterprise Server 15 SP3-LTSS:python3-Flask SUSE Linux Enterprise Server 15 SP4-LTSS:python-Flask SUSE Linux Enterprise Server 15 SP4-LTSS:python311-Flask SUSE Linux Enterprise Server 15 SP5-LTSS:python-Flask SUSE Linux Enterprise Server 15 SP5-LTSS:python311-Flask SUSE Linux Enterprise Server 15-LTSS:python-Flask SUSE Linux Enterprise Server 15-LTSS:python3-Flask SUSE Linux Enterprise Server Teradata 15 SP4:python-Flask SUSE Linux Enterprise Server for SAP Applications 15 SP3:python-Flask SUSE Linux Enterprise Server for SAP Applications 15 SP3:python3-Flask SUSE Linux Enterprise Server for SAP Applications 15 SP4:python-Flask SUSE Linux Enterprise Server for SAP Applications 15 SP4:python311-Flask SUSE Linux Enterprise Server for SAP Applications 15 SP5:python-Flask SUSE Linux Enterprise Server for SAP Applications 15 SP5:python311-Flask openSUSE Leap 15.6:python-Flask openSUSE Leap 15.6:python311-Flask openSUSE Leap 15.6:python311-Flask-doc low 1.9 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L