high7.0
CVE-2026-47725
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/juev/nebula-mesh | <= 0.3.2 | 0.3.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-273q-qgh5-wrj6
- https://github.com/juev/nebula-mesh/security/advisories/GHSA-273q-qgh5-wrj6
- https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.3
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-273q-qgh5-wrj6