Sliver does not restricted traffic between Wireguard clients.

{
  "id": "30530e9d7f4fc696971ca32010f2a7736894ec3c6b9557b224c8bc359b161b6a",
  "url": "https://osv.dev/vulnerability/CVE-2025-27093",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Sliver does not restricted traffic between Wireguard clients.",
    "summary": "Sliver is a command and control framework that uses a custom Wireguard netstack. In versions 1.5.43 and earlier, and in development version 1.6.0-dev, the netstack does not limit traffic between Wireguard clients. This allows clients to communicate with each other unrestrictedly, potentially enabling leaked or recovered keypairs to be used to attack operators or allowing port forwardings to be accessible from other implants.",
    "evidence": "osv:CVE-2025-27093",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-27093",
      "aliases": [
        "CVE-2025-27093",
        "GHSA-q8j9-34qf-7vq7",
        "GO-2025-4079"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bishopfox/sliver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8e5c5f14506d6d60ebb3362e6b9857ab1e0d76ff"
                },
                {
                  "fixed": "9122878cbbcae543eb8210f616550382af2065fd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.5.43"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8e5c5f14506d6d60ebb3362e6b9857ab1e0d76ff"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9122878cbbcae543eb8210f616550382af2065fd"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.5.43",
            "v1.5.41",
            "v1.5.40",
            "v1.5.39",
            "v1.5.38",
            "v1.5.37",
            "v1.5.36",
            "v1.5.35",
            "v1.5.34",
            "v1.5.33",
            "v1.5.32",
            "v1.5.31",
            "v1.5.30",
            "v1.5.29",
            "v1.5.28",
            "v1.5.27",
            "v1.5.26",
            "v1.5.25",
            "v1.5.23",
            "v1.5.24",
            "v1.5.22",
            "v1.5.21",
            "v1.5.20",
            "v1.5.19",
            "v1.5.18",
            "v1.5.17",
            "v1.5.16",
            "v1.5.15",
            "v1.5.14",
            "v1.5.13",
            "v1.5.12",
            "v1.5.11",
            "v1.5.10",
            "v1.5.9",
            "v1.5.7",
            "v1.5.8",
            "v1.5.6",
            "v1.5.5",
            "v1.5.4",
            "v1.5.3",
            "v1.5.2",
            "v1.5.1",
            "v1.5.0",
            "v1.4.21",
            "v1.4.20",
            "v1.4.19",
            "v1.4.18",
            "v1.4.17",
            "v1.4.16",
            "v1.4.15",
            "v1.4.14",
            "v1.4.13",
            "v1.4.12",
            "v1.4.10",
            "v1.4.9",
            "v1.4.8",
            "v1.4.6",
            "v1.4.7",
            "v1.4.5",
            "v1.4.4",
            "v1.4.3",
            "v1.4.2",
            "v1.4.1",
            "v1.4.0",
            "v1.3.1",
            "v1.3.0",
            "v1.2.1",
            "v1.2.0",
            "v1.1.0",
            "v1.1.1",
            "v1.0.8-beta",
            "v1.0.7-beta",
            "v1.0.6-beta",
            "v1.0.3-beta",
            "v1.0.2-beta",
            "v1.0.0-beta",
            "v0.0.6-alpha",
            "v0.0.3-alpha",
            "v0.0.2-alpha",
            "v0.0.1-alpha"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-27093.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.136075094Z",
      "provider": "osv",
      "references": [
        "https://github.com/BishopFox/sliver/security/advisories/GHSA-q8j9-34qf-7vq7",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27093.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-27093",
        "https://github.com/BishopFox/sliver/commit/8e5c5f14506d6d60ebb3362e6b9857ab1e0d76ff",
        "https://github.com/BishopFox/sliver/commit/9122878cbbcae543eb8210f616550382af2065fd"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-284"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27093.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-27093",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490475,
  "published_at": "2025-10-28T19:29:16.147+00:00"
}