{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"moderate"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"SUSE CVE-2026-27205","title":"Title"},{"category":"description","text":"Flask is a web server gateway interface (WSGI) web application framework. In versions 3.1.2 and below, when the session object is accessed, Flask should set the Vary: Cookie header., resulting in a Use of Cache Containing Sensitive Information vulnerability. The logic instructs caches not to cache the response, as it may contain information specific to a logged in user. This is handled in most cases, but some forms of access such as the Python in operator were overlooked. The severity and risk depend on the application being hosted behind a caching proxy that doesn't ignore responses with cookies, not setting a Cache-Control header to mark pages as private or non-cacheable, and accessing the session in a way that only touches keys without reading values or mutating the session. The issue has been fixed in version 3.1.3.","title":"Description of the CVE"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"CVE-2026-27205","url":"https://www.suse.com/security/cve/CVE-2026-27205"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1258700 for CVE-2026-27205","url":"https://bugzilla.suse.com/1258700"},{"category":"external","summary":"Advisory link for SUSE-SU-2026:0849-1","url":"https://lists.suse.com/pipermail/sle-security-updates/2026-March/024661.html"}],"title":"SUSE CVE CVE-2026-27205","tracking":{"current_release_date":"2026-03-13T13:16:27Z","generator":{"date":"2026-02-24T00:24:03Z","engine":{"name":"cve-database.git:bin/generate-csaf-vex.pl","version":"1"}},"id":"CVE-2026-27205","initial_release_date":"2026-02-24T00:24:03Z","revision_history":[{"date":"2026-02-24T00:24:03Z","number":"2","summary":"vulnerabilities added,references added,severity changed from  to moderate"},{"date":"2026-02-27T00:25:08Z","number":"3","summary":"scores added,updates released"},{"date":"2026-03-05T06:50:20Z","number":"4","summary":"updates entered QA"},{"date":"2026-03-10T00:24:55Z","number":"5","summary":"more updates released,references added"},{"date":"2026-03-13T13:16:27Z","number":"6","summary":"more updates marked as affected"}],"status":"interim","version":"6"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_name","name":"SUSE Linux Enterprise Desktop 15 SP7","product":{"name":"SUSE Linux Enterprise Desktop 15 SP7","product_id":"SUSE 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In versions 3.1.2 and below, when the session object is accessed, Flask should set the Vary: Cookie header., resulting in a Use of Cache Containing Sensitive Information vulnerability. The logic instructs caches not to cache the response, as it may contain information specific to a logged in user. This is handled in most cases, but some forms of access such as the Python in operator were overlooked. The severity and risk depend on the application being hosted behind a caching proxy that doesn't ignore responses with cookies, not setting a Cache-Control header to mark pages as private or non-cacheable, and accessing the session in a way that only touches keys without reading values or mutating the session. The issue has been fixed in version 3.1.3.","title":"CVE description"}],"product_status":{"known_affected":["SUSE Linux Enterprise High Performance Computing 12:python-Flask","SUSE Linux Enterprise High Performance Computing 12: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-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 Server 12 SP3:python-Flask","SUSE Linux Enterprise Server 12 SP3:python3-Flask","SUSE Linux Enterprise Server 12 SP4:python-Flask","SUSE Linux Enterprise Server 12 SP4:python3-Flask","SUSE Linux Enterprise Server 12 SP5:python-Flask","SUSE Linux Enterprise Server 12 SP5:python3-Flask","SUSE 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