CVSS 3.1
7.7 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:NCVE-2026-63464
High (7.7). EPSS 0.5% chance of exploitation in the next 30 days. Fixed in github.com/forgekeep/nebula-mesh 0.7.2.
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.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-862, CWE-918
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-7rx3-5wx3-5v76 | Go | github.com/forgekeep/nebula-mesh | >=0.6.0 <0.7.2 | 0.7.2 |
| GO-2026-5985 | Go | github.com/forgekeep/nebula-mesh | >=0.6.0 <0.7.2 | 0.7.2 |
References
- https://github.com/forgekeep/nebula-mesh/commit/f3c54530e388dd21763e548923426e60a8e93ff0
- https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.2
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76