Security advisory

{
  "id": "8e8a05ccc49d4dc216856b2b87c69ab7d64c33a409f33e6b9918bef3cf69ffbf",
  "url": "https://osv.dev/vulnerability/CVE-2020-11498",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-11498",
    "summary": "Slack Nebula through 1.1.0 contains a relative path vulnerability that allows a low-privileged attacker to execute code in the context of the root user via tun_darwin.go or tun_windows.go. A user can also use Nebula to execute arbitrary code in the user's own context, e.g., for user-level persistence or to bypass security controls. NOTE: the vendor states that this \"requires a high degree of access and other preconditions that are tough to achieve.\"",
    "evidence": "osv:CVE-2020-11498",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-11498",
      "aliases": [
        "CVE-2020-11498"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/slackhq/nebula",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "13941aa7232765efc671c6d0d6e1a8c0d4704603"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:slack:nebula:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.1.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.1.0",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-11498.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:43.035008021Z",
      "provider": "osv",
      "references": [
        "https://github.com/slackhq/nebula/pull/191"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-11498",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382803,
  "published_at": "2020-04-02T23:15:13.033+00:00"
}