{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-54397", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-15T11:12:19.647Z", "datePublished": "2026-09-15T15:17:52.261Z", "dateUpdated": "2026-09-15T15:17:52.261Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-15T15:17:52.261Z"}, "datePublic": "2023-08-12T00:00:00.000Z", "title": "Tornado before 6.3.3 HTTP Request Smuggling via Content-Length", "descriptions": [{"lang": "en", "value": "Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsing of Content-Length headers accepting non-standard characters. Attackers can send crafted HTTP requests with these characters to bypass proxy validation and smuggle requests when deployed behind certain proxies."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')", "cweId": "CWE-444", "type": "CWE"}]}], "affected": [{"vendor": "tornadoweb", "product": "tornado", "defaultStatus": "unaffected", "packageURL": "pkg:pypi/tornado", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "6.3.3"}, {"version": "6.3.3", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.3.3"}]}]}], "metrics": [{"cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "baseScore": 9, "baseSeverity": "CRITICAL", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS"}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N", "version": "3.1"}, "format": "CVSS"}], "references": [{"url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-qppv-j76h-2rpx", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-qppv-j76h-2rpx)"}, {"name": "VulnCheck Advisory: Tornado before 6.3.3 HTTP Request Smuggling via Content-Length", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/tornado-before-6.3.3-http-request-smuggling-via-content-length"}], "credits": [{"lang": "en", "value": "kenballus", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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