CVE-2026-49258

Nebula Mesh is a self-hosted control plane for the Slack Nebula mesh VPN. In versions 0.3.5 and below, the web UI /ui/ does not apply the per-operator CA scoping employed by the JSON API. This was partially addressed by GHSA-598g-h2vc-h5vg, but the changes were not implemented in the web...

CVE-2026-49258 Nebula Mesh: Web UI lacks ownership checks, enabling cross-operator access to hosts and networks (read, block, delete)

Nebula Mesh is a self-hosted control plane for the Slack Nebula mesh VPN. In versions 0.3.5 and below, the web UI /ui/ does not apply the per-operator CA scoping employed by the JSON API. This was partially addressed by GHSA-598g-h2vc-h5vg, but the changes were not implemented in the web...

CVE-2026-49258 Nebula Mesh: Web UI lacks ownership checks, enabling cross-operator access to hosts and networks (read, block, delete)

Nebula Mesh is a self-hosted control plane for the Slack Nebula mesh VPN. In versions 0.3.5 and below, the web UI /ui/ does not apply the per-operator CA scoping employed by the JSON API. This was partially addressed by GHSA-598g-h2vc-h5vg, but the changes were not implemented in the web...

CVE-2026-49258 Nebula Mesh: Web UI lacks ownership checks, enabling cross-operator access to hosts and networks (read, block, delete)

Nebula Mesh is a self-hosted control plane for the Slack Nebula mesh VPN. In versions 0.3.5 and below, the web UI /ui/ does not apply the per-operator CA scoping employed by the JSON API. This was partially addressed by GHSA-598g-h2vc-h5vg, but the changes were not implemented in the web...

CVE-2026-49258

Nebula Mesh Web UI contains ownership checks gaps in versions ≤ 0.3.5, allowing authenticated non-admin operators to access, block, or delete resources across operators via endpoints such as /ui/hosts/{id}/block, /ui/hosts/{id}, /ui/hosts, /ui/networks, and /ui/events. The root cause is improper ...

Nebula Mesh: Web UI lacks ownership checks, enabling cross-operator access to hosts and networks (read, block, delete)

Summary The web UI /ui/ does not apply the per-operator CA scoping the JSON API received for GHSA-598g-h2vc-h5vg. Any authenticated non-admin operator for example, one created via self-registration or OIDC can access resources belonging to other operators. Impact A non-admin operator can: - Block...

PT-2026-53022

Name of the Vulnerable Software and Affected Versions Nebula Mesh affected versions not specified Description The web UI /ui/ fails to apply per-operator Certificate Authority CA scoping. This allows any authenticated non-admin operator to access, block, or delete resources belonging to other...