CVE-2026-47722

HIGH8.7

nebula-mesh: Host advanced overrides allow YAML injection into agent config.yml

Published Jul 23, 2026

Modified 1 months ago

Details

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.

References

WEB

https://github.com/forgekeep/nebula-mesh/commit/c1506f7344ab375a145a7449b193af3f19bb41ef

WEB

https://github.com/forgekeep/nebula-mesh/issues/126

WEB

https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7hp6-g3pq-3pc3

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-47722

CVSS Analysis

CVSS v4.0

8.7