Security update for python-tornado SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2026:0838-1 Final 1 1 2026-03-06T08:15:16Z current 2026-03-06T08:15:16Z 2026-03-06T08:15:16Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for python-tornado This update for python-tornado fixes the following issue: - CVE-2025-67724: missing validation of the supplied reason phrase (bsc#1254903). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2026-838,SUSE-SLE-Micro-5.3-2026-838,SUSE-SLE-Micro-5.4-2026-838,SUSE-SLE-Micro-5.5-2026-838,SUSE-SLE-Module-Basesystem-15-SP7-2026-838,SUSE-SUSE-MicroOS-5.2-2026-838 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2026/suse-su-20260838-1/ Link for SUSE-SU-2026:0838-1 https://lists.suse.com/pipermail/sle-security-updates/2026-March/024640.html E-Mail link for SUSE-SU-2026:0838-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1254903 SUSE Bug 1254903 https://www.suse.com/security/cve/CVE-2025-67724/ SUSE CVE CVE-2025-67724 page SUSE Linux Enterprise Micro 5.2 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Micro 5.4 SUSE Linux Enterprise Micro 5.5 SUSE Linux Enterprise Module for Basesystem 15 SP7 python2-tornado-4.5.3-150000.3.16.1 python3-tornado-4.5.3-150000.3.16.1 python3-tornado-4.5.3-150000.3.16.1 as a component of SUSE Linux Enterprise Micro 5.2 python3-tornado-4.5.3-150000.3.16.1 as a component of SUSE Linux Enterprise Micro 5.3 python3-tornado-4.5.3-150000.3.16.1 as a component of SUSE Linux Enterprise Micro 5.4 python3-tornado-4.5.3-150000.3.16.1 as a component of SUSE Linux Enterprise Micro 5.5 python3-tornado-4.5.3-150000.3.16.1 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP7 Tornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, the supplied reason phrase is used unescaped in HTTP headers (where it could be used for header injection) or in HTML in the default error page (where it could be used for XSS) and can be exploited by passing untrusted or malicious data into the reason argument. Used by both RequestHandler.set_status and tornado.web.HTTPError, the argument is designed to allow applications to pass custom "reason" phrases (the "Not Found" in HTTP/1.1 404 Not Found) to the HTTP status line (mainly for non-standard status codes). This issue is fixed in version 6.5.3. CVE-2025-67724 SUSE Linux Enterprise Micro 5.2:python3-tornado-4.5.3-150000.3.16.1 SUSE Linux Enterprise Micro 5.3:python3-tornado-4.5.3-150000.3.16.1 SUSE Linux Enterprise Micro 5.4:python3-tornado-4.5.3-150000.3.16.1 SUSE Linux Enterprise Micro 5.5:python3-tornado-4.5.3-150000.3.16.1 SUSE Linux Enterprise Module for Basesystem 15 SP7:python3-tornado-4.5.3-150000.3.16.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2026/suse-su-20260838-1/ https://www.suse.com/security/cve/CVE-2025-67724.html CVE-2025-67724 https://bugzilla.suse.com/1254903 SUSE Bug 1254903