{
    "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"
            }
        }
    }
}