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

June 26, 2026

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.

References

github.com/advisories/GHSA-c6v2-3ffm-vcmc
github.com/juev/nebula-mesh/security/advisories/GHSA-c6v2-3ffm-vcmc
nvd.nist.gov/vuln/detail/CVE-2026-49258

Code Behaviors & Features

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