{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-116578", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-26T15:03:39.035Z", "datePublished": "2026-10-26T20:22:32.217Z", "dateUpdated": "2026-10-26T20:22:32.217Z"}, "containers": {"cna": {"title": "Tornado: Open redirect in RedirectHandler via protocol-relative URLs", "problemTypes": [{"descriptions": [{"cweId": "CWE-601", "lang": "en", "description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 2.1, "baseSeverity": "LOW", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-pw9p-v7r6-gx4p", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-pw9p-v7r6-gx4p"}, {"name": "https://github.com/tornadoweb/tornado/pull/3786", "tags": ["x_refsource_MISC"], "url": "https://github.com/tornadoweb/tornado/pull/3786"}, {"name": "https://github.com/tornadoweb/tornado/commit/940ea725bdd9bc68231d68a105eef17ea6e11233", "tags": ["x_refsource_MISC"], "url": "https://github.com/tornadoweb/tornado/commit/940ea725bdd9bc68231d68a105eef17ea6e11233"}, {"name": "https://github.com/tornadoweb/tornado/commit/cc75ab0eb3af459c714895a49f682ad354f50117", "tags": ["x_refsource_MISC"], "url": "https://github.com/tornadoweb/tornado/commit/cc75ab0eb3af459c714895a49f682ad354f50117"}, {"name": "https://github.com/tornadoweb/tornado/commit/ccb6a2e5482f17997efd4a74b8200d5b4babc035", "tags": ["x_refsource_MISC"], "url": "https://github.com/tornadoweb/tornado/commit/ccb6a2e5482f17997efd4a74b8200d5b4babc035"}, {"name": "https://github.com/tornadoweb/tornado/releases/tag/v6.6.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/tornadoweb/tornado/releases/tag/v6.6.0"}], "affected": [{"vendor": "tornadoweb", "product": "tornado", "versions": [{"version": "< 6.6", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-26T20:22:32.217Z"}, "descriptions": [{"lang": "en", "value": "Tornado is a Python web framework and asynchronous networking library. Prior to 6.6, tornado.web.RedirectHandler URL templates can place regex-capture substitutions where crafted request paths change the redirect scheme or network location. Affected placements include substitutions at the start of a path, directly after a fixed host, or at the beginning of the template, including protocol-relative, absolute, backslash, encoded, host-extension, and user-info variants interpreted by browsers as attacker-controlled destinations. Static templates and substitutions after a fixed host followed by a slash are not affected. An attacker can use the resulting open redirect on the application's domain for phishing. This issue is fixed in version 6.6."}], "source": {"advisory": "GHSA-pw9p-v7r6-gx4p", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "tornado", "vendor": "tornadoweb", "versions": [{"status": "affected", "version": "< 6.6"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Tornado is a Python web framework and asynchronous networking library. Prior to 6.6, tornado.web.RedirectHandler URL templates can place regex-capture substitutions where crafted request paths change the redirect scheme or network location. Affected placements include substitutions at the start of a path, directly after a fixed host, or at the beginning of the template, including protocol-relative, absolute, backslash, encoded, host-extension, and user-info variants interpreted by browsers as attacker-controlled destinations. Static templates and substitutions after a fixed host followed by a slash are not affected. An attacker can use the resulting open redirect on the application's domain for phishing. This issue is fixed in version 6.6."}], "id": "CVE-2026-116578", "lastModified": "2026-10-26T21:18:15.077", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.1, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-26T21:18:14.747", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/tornadoweb/tornado/commit/940ea725bdd9bc68231d68a105eef17ea6e11233"}, {"source": "security-advisories@github.com", "url": "https://github.com/tornadoweb/tornado/commit/cc75ab0eb3af459c714895a49f682ad354f50117"}, {"source": "security-advisories@github.com", "url": "https://github.com/tornadoweb/tornado/commit/ccb6a2e5482f17997efd4a74b8200d5b4babc035"}, {"source": "security-advisories@github.com", "url": "https://github.com/tornadoweb/tornado/pull/3786"}, {"source": "security-advisories@github.com", "url": "https://github.com/tornadoweb/tornado/releases/tag/v6.6.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-pw9p-v7r6-gx4p"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,6.6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "tornado", "source": "cna", "vendor": "tornadoweb"}, "product": "tornado", "vendor": "tornadoweb"}], "created": "2026-10-26T22:15:15.139320+00:00", "updated": "2026-10-26T22:45:13.834137+00:00", "vendors": ["tornadoweb", "tornadoweb$PRODUCT$tornado"]}