High 8.1Published Sep 4, 2026

CVE-2026-61699nebula-mesh: Certificate revocation is never enforced at the mesh

Updated under an hour ago (2026-10-19 06:10 UTC)

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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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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. 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.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-299, CWE-672
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)	before 0.7.1	CNA record

References

https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-cm26-5974-52h8x-refsource-confirm
https://github.com/forgekeep/nebula-mesh/commit/0426e2f224a9b1e2029029bf923c93ed39d21cdbx-refsource-misc
https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.1x-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.