{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49853","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-01T22:03:19.640Z","datePublished":"2026-07-14T20:41:32.075Z","dateUpdated":"2026-07-21T14:47:51.048Z"},"containers":{"cna":{"title":"Tornado: Authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient","problemTypes":[{"descriptions":[{"cweId":"CWE-200","lang":"en","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/tornadoweb/tornado/security/advisories/GHSA-3x9g-8vmp-wqvf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tornadoweb/tornado/security/advisories/GHSA-3x9g-8vmp-wqvf"},{"name":"https://github.com/tornadoweb/tornado/pull/3626","tags":["x_refsource_MISC"],"url":"https://github.com/tornadoweb/tornado/pull/3626"},{"name":"https://github.com/tornadoweb/tornado/commit/aba2569f7ed7a6bdbef816658fb6b7182531b751","tags":["x_refsource_MISC"],"url":"https://github.com/tornadoweb/tornado/commit/aba2569f7ed7a6bdbef816658fb6b7182531b751"},{"name":"https://github.com/tornadoweb/tornado/releases/tag/v6.5.6","tags":["x_refsource_MISC"],"url":"https://github.com/tornadoweb/tornado/releases/tag/v6.5.6"}],"affected":[{"vendor":"tornadoweb","product":"tornado","versions":[{"version":"< 6.5.6","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-14T20:41:32.075Z"},"descriptions":[{"lang":"en","value":"Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed only the Host header, leaving Authorization, auth_username, auth_password, and auth_mode in place when a redirect changed scheme, host, or port. This issue is fixed in version 6.5.6."}],"source":{"advisory":"GHSA-3x9g-8vmp-wqvf","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-21T14:47:40.043460Z","id":"CVE-2026-49853","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-21T14:47:51.048Z"}}]}}