{"id":"CVE-2026-103262","revision":"511eee9340914d0d9b2af525f184d3a5","records":[{"revision":"511eee9340914d0d9b2af525f184d3a5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-103262","aliases":[],"title":"Tornado before 6.5.9 Denial of Service via CurlAsyncHTTPClient","description":"Tornado versions before 6.5.9 contain an unbounded memory accumulation vulnerability in CurlAsyncHTTPClient that allows remote attackers to cause denial of service by sending a compressed response. Attackers can send a gzip-encoded decompression bomb that accumulates in memory without size limits, causing the application process to be killed by out-of-memory conditions.","state":0,"publishedAt":"2026-10-01T10:42:04.913+00:00","modifiedAt":"2026-10-06T00:08:58.078+00:00","affected":[{"ecosystem":"Vendor product","name":"tornado","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"tornadoweb\",\n                    \"product\": \"tornado\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"6.5.9\"\n                        },\n                        {\n                            \"version\": \"6.5.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:pypi/tornado\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/tornadoweb/tornado/security/advisories/GHSA-chx6-46f5-w4vp","https://github.com/tornadoweb/tornado/commit/e412435febba4569c552c5c9054f1bf92bd171a9","https://www.vulncheck.com/advisories/tornado-before-6.5.9-denial-of-service-via-curlasynchttpclient"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103262","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-103262","identifiers":["CVE-2026-103262"]},"retained":false,"historicalAffected":[]}],"coverage":[]}