{"schema_version":"1.7.2","id":"OESA-2026-3973","modified":"2026-09-20T13:23:43Z","published":"2026-09-20T13:23:43Z","upstream":["CVE-2026-82397"],"summary":"python-tornado security update","details":"Tornado is an open source version of the scalable, non-blocking web server and tools.\r\n\r\nSecurity Fix(es):\n\nTornado is a Python web framework and asynchronous networking library. Prior to 6.5.8, Tornado parses application/x-www-form-urlencoded request bodies with urllib.parse.parse_qs in tornado/escape.py without passing max_num_fields. RequestHandler._execute in tornado/web.py parses the body before handler dispatch through HTTPServerRequest._parse_body and parse_body_arguments in tornado/httputil.py, so an unauthenticated request body containing millions of separator-delimited fields can synchronously stall the single-threaded event loop and delay every connection. The body is bounded only by max_buffer_size, which defaults to 104857600 bytes. This issue is fixed in version 6.5.8.(CVE-2026-82397)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP1","name":"python-tornado","purl":"pkg:rpm/openEuler/python-tornado&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5-6.oe2403sp1"}]}],"ecosystem_specific":{"aarch64":["python-tornado-debuginfo-6.5-6.oe2403sp1.aarch64.rpm","python-tornado-debugsource-6.5-6.oe2403sp1.aarch64.rpm","python-tornado-help-6.5-6.oe2403sp1.aarch64.rpm","python3-tornado-6.5-6.oe2403sp1.aarch64.rpm"],"src":["python-tornado-6.5-6.oe2403sp1.src.rpm"],"x86_64":["python-tornado-debuginfo-6.5-6.oe2403sp1.x86_64.rpm","python-tornado-debugsource-6.5-6.oe2403sp1.x86_64.rpm","python-tornado-help-6.5-6.oe2403sp1.x86_64.rpm","python3-tornado-6.5-6.oe2403sp1.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3973"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82397"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"database_specific":{"severity":"High"}}