{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-108261",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-09T17:33:15.410Z",
        "datePublished": "2026-10-09T20:43:37.580Z",
        "dateUpdated": "2026-10-09T20:43:37.580Z"
    },
    "containers": {
        "cna": {
            "title": "TinaCMS admin preview iframe loads an attacker-controlled origin from the URL fragment",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-346",
                            "lang": "en",
                            "description": "CWE-346: Origin Validation Error",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-441",
                            "lang": "en",
                            "description": "CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-601",
                            "lang": "en",
                            "description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7"
                },
                {
                    "name": "https://github.com/tinacms/tinacms/pull/7522",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tinacms/tinacms/pull/7522"
                },
                {
                    "name": "https://github.com/tinacms/tinacms/commit/b57dbf4b56201aef15cd92caa49fd12ab96bbecf",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tinacms/tinacms/commit/b57dbf4b56201aef15cd92caa49fd12ab96bbecf"
                },
                {
                    "name": "https://github.com/tinacms/tinacms/releases/tag/@tinacms/app@2.5.14",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tinacms/tinacms/releases/tag/@tinacms/app@2.5.14"
                },
                {
                    "name": "https://github.com/tinacms/tinacms/releases/tag/tinacms@3.14.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tinacms/tinacms/releases/tag/tinacms@3.14.0"
                }
            ],
            "affected": [
                {
                    "vendor": "tinacms",
                    "product": "tinacms",
                    "versions": [
                        {
                            "version": "< 3.14.0",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "@tinacms",
                    "product": "app",
                    "versions": [
                        {
                            "version": "< 2.5.14",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-09T20:43:37.580Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Tina is a headless content management system. Prior to tinacms 3.14.0 and @tinacms/app 2.5.14, the /~/* admin preview route in packages/tinacms/src/admin/index.tsx can turn an attacker-controlled hash-router splat into an off-origin iframe URL through packages/@tinacms/app/src/preview.tsx, while packages/@tinacms/app/src/lib/preview-origin.ts derives expectedOrigin from that same URL for the GraphQL message channel in packages/@tinacms/app/src/lib/graphql-reducer.ts. An unauthenticated attacker can send a crafted link to a signed-in editor, cause the admin to frame an attacker origin, and have that frame treated as the trusted preview. The attacker-controlled frame can submit GraphQL reads or mutations that the admin executes with the editor credentials, exposing or modifying protected content. This issue is fixed in tinacms 3.14.0 and @tinacms/app 2.5.14."
                }
            ],
            "source": {
                "advisory": "GHSA-x34j-47hf-4xg7",
                "discovery": "UNKNOWN"
            }
        }
    }
}