CVE-2026-108261 TinaCMS admin preview iframe loads an attacker-controlled origin from the URL fragment

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...

CVE-2026-108261

Tina, a headless content management system, is vulnerable to an origin validation error in versions prior to tinacms 3.14.0 and @tinacms/app 2.5.14 . The vulnerability exists because the /~/* admin preview route can convert an attacker-controlled hash-router splat into an off-origin iframe URL vi...