{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-70486",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-04T15:24:41.340Z",
        "datePublished": "2026-08-04T20:01:55.319Z",
        "dateUpdated": "2026-08-04T20:01:55.319Z"
    },
    "containers": {
        "cna": {
            "title": "Open WebUI: Same-origin XSS to account takeover via terminal file-preview iframe hardcoding allow-same-origin",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-79",
                            "lang": "en",
                            "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-1021",
                            "lang": "en",
                            "description": "CWE-1021: Improper Restriction of Rendered UI Layers or Frames",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 8.2,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3xpf-xq7r-v8c5",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3xpf-xq7r-v8c5"
                },
                {
                    "name": "https://github.com/open-webui/open-webui/pull/26907",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/open-webui/open-webui/pull/26907"
                },
                {
                    "name": "https://github.com/open-webui/open-webui/commit/65a5fad7b97db99d490d81f4e0860282c3a4543c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/open-webui/open-webui/commit/65a5fad7b97db99d490d81f4e0860282c3a4543c"
                },
                {
                    "name": "https://github.com/open-webui/open-webui/releases/tag/v0.11.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.0"
                }
            ],
            "affected": [
                {
                    "vendor": "open-webui",
                    "product": "open-webui",
                    "versions": [
                        {
                            "version": ">= 0.9.0, < 0.11.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-04T20:01:55.319Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, the terminal file-preview serveUrl iframe branch always granted allow-same-origin together with allow-scripts for HTML files served from the application origin. Any authenticated user with access to a configured terminal server could cause script in a previewed file to run in the Open WebUI origin, read the victim's session token from localStorage, and take over the account, with possible server-side code execution if the victim was an admin or held workspace.functions. This issue is fixed in 0.11.0."
                }
            ],
            "source": {
                "advisory": "GHSA-3xpf-xq7r-v8c5",
                "discovery": "UNKNOWN"
            }
        }
    }
}