CVE-2026-63464
highnebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN.
nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. From version 0.6.0 to before version 0.7.2, non-admin operators (role user) can set allow_private: true on their own managed webhook subscription (POST/PATCH /api/v1/webhook-subscriptions). No admin check exists on this field. At delivery time, allow_private switches the dispatcher to an unguarded HTTP client, bypassing the private/loopback/link-local SSRF guard — letting a low-privilege operator make the server request internal addresses. This issue has been patched in version 0.7.2.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/forgekeep/nebula-mesh/commit/f3c54530e388dd21763e548923426e60a8e93ff0 security-advisories@github.com
- https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.2 security-advisories@github.com
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76 security-advisories@github.com
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76 134c704f-9b21-4f2e-91b3-4a467353bcc0