CVE-2026-55660
CVE-2026-55660 · TinaCMS: Cross-origin postMessage handlers and rich-text URL-sanitization bypass enable stored XSS and session takeover
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
Tina is a headless content management system. In versions prior to @tinacms/app 2.5.6 and tinacms 3.9.3, cross-origin postMessage handlers and a rich-text URL-sanitization bypass enable stored XSS and session takeover. The library registers window message listeners — the useTina overlay handler, the OAuth authentication popup handler, and the admin↔preview iframe GraphQL reducer — that act on event.data without verifying event.origin or event.source and post messages using non-specific target origins, while insufficient URL sanitization in rich-text content allows malicious URLs to persist and execute. A page the victim visits (or a window in an opener/iframe relationship with a Tina admin) can forge messages to drive the editor, inject preview content, or observe/forge the OAuth popup channel to take over an authenticated editing session. This issue has been fixed in versions @tinacms/app 2.5.6 and tinacms 3.9.3.
CVSS 7.6 · Alta · EPSS 0,3% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: node
Productos y versiones afectados
tinacms
- Versiones
- < 3.9.3: Afectada
Sin corrección publicada
@tinacms/app
- Versiones
- < 2.5.6: Afectada
Sin corrección publicada
tinacms npm
- Intervalos de versiones afectados
- SEMVER: < 3.9.3
Actualiza a 3.9.3
@tinacms/app npm
- Intervalos de versiones afectados
- SEMVER: < 2.5.6
Actualiza a 2.5.6