CVE-2026-47722 Details
Description
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.2, `internal/configgen/generator.go:86,108,119` interpolates the operator-supplied `ListenHost` and `TunDevice` fields raw into a `text/template` that produces the agent's `config.yml`. `internal/web/advanced.go:20-35` accepts both with only `strings.TrimSpace` — no character or shape validation. Version 0.3.2 fixes the issue.
A vulnerability in Nebula Mesh versions prior to 0.3.2 allows for YAML injection into the agent's configuration file. The issue arises because the 'ListenHost' and 'TunDevice' fields are interpolated directly into a text template without proper validation, leaving room for malicious input to be executed as YAML keys. This vulnerability can be exploited by operators to manipulate their own host's configuration or, in some cases, affect other tenants' hosts.
Users can update to Nebula Mesh version 0.3.2 or later, where this vulnerability has been fixed by replacing the text template-based configuration generation with a typed-struct approach that properly validates and sanitizes the input.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 23, 2026CISA-ADP
Assessed Jul 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/forgekeep/nebula-mesh/commit/c1506f7344ab375a145a7449b193af3f19bb41ef | [email protected] | Source CodeVendor |
| https://github.com/forgekeep/nebula-mesh/issues/126 | [email protected] | Issue TrackingTechnical DescriptionVendor |
| https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7hp6-g3pq-3pc3 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| forgekeep nebula-mesh | <= 0.3.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Modified | CISA-ADP |
| Jul 23, 2026 | New CVE Received | [email protected] |