nebula-mesh: Certificate revocation is never enforced at the mesh

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-61699
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-04 20:17:24 UTC
Updated2026-09-04 20:17:24 UTC
Descriptionnebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. Prior to version 0.7.1, revocation is the only in-band mechanism that isolates a compromised/offboarded host from a Nebula mesh. Because the blocklist never reaches any peer's config.yml, a Blocked host retains full overlay reachability to every peer under its CA (and internal services on the mesh) for up to 30d (agent) / 365d (mobile). An attacker who exfiltrates host.key+host.crt can run stock slackhq/nebula directly, ignore the agent's 403/410 poll responses, and stay connected after the operator revokes the host. Operator-visible state (UI shows blocked, audit log records it) is misleading. This issue has been patched in version 0.7.1.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Problem Types: CWE-299 | CWE-672 | CWE-299 CWE-299: Improper Check for Certificate Revocation | CWE-672 CWE-672: Operation on a Resource after Expiration or Release

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Forgekeep Nebula-mesh affected < 0.7.1 Not specified

References

ReferenceSourceLinkTags
github.com/forgekeep/nebula-mesh/releases/tag/v0.7.1 [email protected] github.com
github.com/forgekeep/nebula-mesh/security/advisories/GHSA-cm26-5974-52h8 [email protected] github.com
github.com/forgekeep/nebula-mesh/commit/0426e2f224a9b1e2029029bf923c93ed... [email protected] github.com
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