CVE-2026-47725

nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.3, every /ui/* POST / PUT / PATCH / DELETE route processes the request as soon as the session cookie validates. SameSite=Lax on the session cookie prevents most cross-site form submits but does not protect: top-level form-submit navigations from third-party pages (some browsers still send Lax cookies on top-level POSTs); same-registrable-domain attackers (sibling-subdomain XSS, subdomain takeover); the GET /ui/logout route, which a third-party <img src=".../ui/logout"> can force-trigger. This issue has been patched in version 0.3.3.

CVSS

No CVSS.

References

Link	Resource
https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.3
https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-273q-qgh5-wrj6
https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-273q-qgh5-wrj6

Configurations

No configuration.

History

23 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) nebula-mesh es un plano de control autoalojado para la red privada virtual de malla Slack Nebula. Antes de la versión 0.3.3, cada ruta /ui/* POST / PUT / PATCH / DELETE procesa la solicitud tan pronto como la cookie de sesión valida. SameSite=Lax en la cookie de sesión previene la mayoría de los envíos de formularios entre sitios, pero no protege: las navegaciones de envío de formularios de nivel superior desde páginas de terceros (algunos navegadores aún envían cookies Lax en POSTs de nivel superior); atacantes del mismo dominio registrable (XSS de subdominio hermano, toma de control de subdominio); la ruta GET /ui/logout, que un tercero <img src=’... / ui/logout’> puede forzar a activar. Este problema ha sido parcheado en la versión 0.3.3.

Information

Published : 2026-07-28 19:17

Updated : 2026-10-23 23:10

NVD link : CVE-2026-47725

Mitre link : CVE-2026-47725

CVE.ORG link : CVE-2026-47725

JSON object : View

Products Affected

No product.

CWE

CWE-352

Cross-Site Request Forgery (CSRF)

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