CVE-2026-63464
Nebula-mesh allows non-admin operators to disable webhook SSRF protection via `allow_private`
CVSS Score
7.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 CWE-918 |
| Vendor | forgekeep |
| Product | nebula-mesh |
| Published | Sep 4, 2026 |
| Last Updated | Sep 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
forgekeep / nebula-mesh
>= 0.6.0, < 0.7.2