CVSS 3.1
5.4 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NCVE-2026-55513
Medium (5.4). EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/forgekeep/nebula-mesh 0.5.0.
nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. From version 0.3.0 to before version 0.5.0, the nebula-mgmt Web UI host-creation path ignores both the server-wide enrollment_token_ttl security setting and per-network network_config.enrollment_token_ttl overrides. API host creation and token-regeneration paths use the configured TTL resolver, but POST /ui/hosts hardcodes now.Add(24 * time.Hour) for newly minted agent enrollment tokens. In deployments that intentionally reduce enrollment-token lifetime, any authenticated operator who can create a host through the Web UI can still mint a bearer enrollment token valid for about 24 hours. This issue has been patched in version 0.5.0.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)
- CWE
- CWE-613
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-g4x6-jcvr-9m3g | Go | github.com/forgekeep/nebula-mesh | >=0.3.0 <0.5.0 | 0.5.0 |
| GO-2026-5987 | Go | github.com/forgekeep/nebula-mesh | >=0.4.0 <0.5.0 | 0.5.0 |
| GO-2026-5987 | Go | github.com/juev/nebula-mesh | >=0.3.0 | no fix published |
References
- https://github.com/forgekeep/nebula-mesh/commit/514006029e09f1991122b86a80e7b25970bcfa98
- https://github.com/forgekeep/nebula-mesh/releases/tag/v0.5.0
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-g4x6-jcvr-9m3g
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-g4x6-jcvr-9m3g