{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123534", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-06T00:48:01.382Z", "datePublished": "2026-11-08T01:37:42.381Z", "dateUpdated": "2026-11-08T01:37:42.381Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-08T01:37:42.381Z"}, "datePublic": "2026-10-22T00:00:00.000Z", "title": "Tornado before 6.6 Path Traversal via static_url() Version Hashing", "descriptions": [{"lang": "en", "value": "Tornado before 6.6 contains a path traversal vulnerability in RequestHandler.static_url() and get_version() that allows attackers to hash files outside static_path using ../ sequences. Attackers controlling input passed to static_url() can obtain SHA-512 hashes of readable files to confirm their existence, or reference /dev/zero to block the event loop indefinitely."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "cweId": "CWE-22", "type": "CWE"}]}], "affected": [{"vendor": "tornadoweb", "product": "tornado", "defaultStatus": "unaffected", "packageURL": "pkg:pypi/tornado", "versions": [{"version": "0", "status": "affected", "versionType": "custom", "lessThan": "6.6"}, {"version": "6.6", "status": "unaffected", "versionType": "custom"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.6"}]}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 8.3, "baseSeverity": "HIGH", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS"}, {"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM"}, "format": "CVSS"}], "references": [{"url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-v8g8-cp5j-42fg", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-v8g8-cp5j-42fg)"}, {"name": "VulnCheck Advisory: Tornado before 6.6 Path Traversal via static_url() Version Hashing", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/tornado-before-6.6-path-traversal-via-static-url-version-hashing"}], "credits": [{"lang": "en", "value": "TraceHanami", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}