nebula-mesh: Web UI host creation ignores configured enrollment token TTL and mints 24-hour bearer enrollment tokens

{
  "id": "494cd29421dce858216615569d8b1caf89e4001d1be08edad164c6ff2703dd9e",
  "url": "https://osv.dev/vulnerability/CVE-2026-55513",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nebula-mesh: Web UI host creation ignores configured enrollment token TTL and mints 24-hour bearer enrollment tokens",
    "summary": "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.",
    "evidence": "osv:CVE-2026-55513",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-55513",
      "aliases": [
        "CVE-2026-55513",
        "GHSA-g4x6-jcvr-9m3g",
        "GO-2026-5987"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/forgekeep/nebula-mesh",
              "type": "GIT",
              "events": [
                {
                  "introduced": "071db75dc49b1f677a307af28d91d70d20c89163"
                },
                {
                  "fixed": "7186b86821fc210f191eb44bcb52ef108149f02c"
                },
                {
                  "fixed": "514006029e09f1991122b86a80e7b25970bcfa98"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.3.0"
                      },
                      {
                        "fixed": "0.5.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "514006029e09f1991122b86a80e7b25970bcfa98"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7186b86821fc210f191eb44bcb52ef108149f02c"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.5.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.4.0",
            "v0.3.8",
            "v0.3.7",
            "v0.3.6",
            "v0.3.5",
            "v0.3.4",
            "v0.3.3",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55513.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.972242762Z",
      "provider": "osv",
      "references": [
        "https://github.com/forgekeep/nebula-mesh/releases/tag/v0.5.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55513.json",
        "https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-g4x6-jcvr-9m3g",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-55513",
        "https://github.com/forgekeep/nebula-mesh/commit/514006029e09f1991122b86a80e7b25970bcfa98"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-613"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55513.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-55513",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494799,
  "published_at": "2026-09-04T19:43:18.876+00:00"
}