Security advisory

{
  "id": "635639abd9e6de78fee662ef2f23dfedf080bff3f3fd3780ad49a877e2b8bd9d",
  "url": "https://osv.dev/vulnerability/CVE-2018-17780",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-17780",
    "summary": "Telegram Desktop (aka tdesktop) 1.3.14, and Telegram 3.3.0.0 WP8.1 on Windows, leaks end-user public and private IP addresses during a call because of an unsafe default behavior in which P2P connections are accepted from clients outside of the My Contacts list.",
    "evidence": "osv:CVE-2018-17780",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-17780",
      "aliases": [
        "CVE-2018-17780"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/telegramdesktop/tdesktop",
              "type": "GIT",
              "events": [
                {
                  "introduced": "45c1427f912adda4145a0040126c56fe4751e789"
                },
                {
                  "last_affected": "45c1427f912adda4145a0040126c56fe4751e789"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:telegram:telegram_desktop:1.3.14:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.3.14"
                      },
                      {
                        "last_affected": "1.3.14"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.3.14",
            "v1.3.14"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-17780.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:26.087394020Z",
      "provider": "osv",
      "references": [
        "https://www.inputzero.io/2018/09/bug-bounty-telegram-cve-2018-17780.html"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:telegram:telegram_messenger:3.3.0.0:*:*:*:*:windows:*:*"
            ],
            "vendor_product": "telegram:telegram_messenger",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "3.3.0.0"
                  },
                  {
                    "last_affected": "3.3.0.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-17780",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431532,
  "published_at": "2018-09-29T19:29:00.237+00:00"
}