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SCA: security update for github.com/forgekeep/nebula-mesh (GHSA-g4x6-jcvr-9m3g)

medium Tenable Cloud Security Plugin ID 444707

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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.
 (CVE-2026-55513)

Solution

Update the github.com/forgekeep/nebula-mesh library and its related packages to version 0.5.0 or later.

See Also

https://github.com/advisories/GHSA-g4x6-jcvr-9m3g

Plugin Details

Severity: Medium

ID: 444707

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 7/15/2026

Updated: 9/7/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 7.83

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

CVSS Score Source: CVE-2026-55513

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/14/2026

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-55513

cwe: CWE-613