CVE-2026-63464Nebula-mesh allows non-admin operators to disable webhook SSRF protection via `allow_private`
Updated under an hour ago ()
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It affects forgekeep nebula-mesh. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-862, CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
forgekeep nebula-mesh forgekeep:nebula_mesh (from the name) | from 0.6.0, < 0.7.2 | CNA record |
References
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76x-refsource-confirm
- https://github.com/forgekeep/nebula-mesh/commit/f3c54530e388dd21763e548923426e60a8e93ff0x-refsource-misc
- https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.2x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.