High 7.7Published Sep 4, 2026

CVE-2026-63464Nebula-mesh allows non-admin operators to disable webhook SSRF protection via `allow_private`

Updated under an hour ago (Oct 28, 2026, 11:40 AM ET)

Does this affect you?

It affects forgekeep nebula-mesh. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for forgekeep nebula-mesh

Exploited in the last 30 days

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

Affected products

forgekeep nebula-mesh forgekeep:nebula_mesh (from the name)	from 0.6.0, < 0.7.2	CNA record

References

References

https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76	x-refsource-confirm
https://github.com/forgekeep/nebula-mesh/commit/f3c54530e388dd21763e548923426e60a8e93ff0	x-refsource-misc
https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.2	x-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.