Authorization Flaw in nebula-mesh Control Plane for Slack by Forgekeep
CVE-2026-47724

9.9CRITICAL

Key Information:

Vendor

Juev

Status
Nebula-mesh
Vendor
CVE Published:
23 July 2026

What is CVE-2026-47724?

The nebula-mesh control plane, designed for managing Slack's Nebula mesh virtual private network, has a critical authorization flaw affecting the /api/v1/* route. Prior to version 0.3.4, this route relied solely on the bearer token for authorization, thereby exposing multiple endpoints to potential misuse by non-admin operators. This oversight allows unauthorized access across tenants, creating a significant risk of privilege escalation through specific API keys. The issue has been addressed with the release of version 0.3.4, enhancing security by implementing more stringent access controls.

Affected Version(s)

nebula-mesh < 0.3.4

References

https://github.com/forgekeep/nebula-mesh/security/advisor...
x_refsource_CONFIRM
https://github.com/forgekeep/nebula-mesh/commit/9d8bcd766...
x_refsource_MISC

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.