{"id":"CVE-2026-108261","revision":"9d7be5a552f745b9bf7ee5a2369119a4","records":[{"revision":"9d7be5a552f745b9bf7ee5a2369119a4","observedAt":"2026-10-25T05:17:13.11+00:00","statement":{"source":"nvd","id":"CVE-2026-108261","aliases":[],"title":"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 …","description":"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.","state":0,"publishedAt":"2026-10-09T21:17:04.347+00:00","modifiedAt":"2026-10-16T20:04:29.76+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","score":9.3,"severity":"CRITICAL"}],"references":["https://github.com/tinacms/tinacms/commit/b57dbf4b56201aef15cd92caa49fd12ab96bbecf","https://github.com/tinacms/tinacms/pull/7522","https://github.com/tinacms/tinacms/releases/tag/@tinacms/app@2.5.14","https://github.com/tinacms/tinacms/releases/tag/tinacms@3.14.0","https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-108261","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-346","CWE-441","CWE-601"],"productCriteria":[],"sourceDates":{"published":"2026-10-09T21:17:04.347","lastModified":"2026-10-16T20:04:29.760"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-108261","identifiers":["CVE-2026-108261"]},"retained":false,"historicalAffected":[]}],"coverage":[]}