Security advisory

{
  "id": "e427f5956cd0a644a9bd5bea31f04b79f19df2fa2a342bbbbd3cc857e271bca6",
  "url": "https://osv.dev/vulnerability/CVE-2026-13698",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-13698",
    "summary": "A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service",
    "evidence": "osv:CVE-2026-13698",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-13698",
      "aliases": [
        "CVE-2026-13698"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openvpn/openvpn",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a73072d8f780e888aca7d79b993b1e59c9d8f364"
                },
                {
                  "last_affected": "6fb2a2560845e15da8918c114fe020b4a06b3cef"
                },
                {
                  "introduced": "b999466418dddb89721be5455f03bacd9b221b1d"
                },
                {
                  "fixed": "4dee614e4e799d6d4a20bffabd902291c86406f2"
                },
                {
                  "introduced": "ee1577744fb09af760dc319d57746e6abc55db85"
                },
                {
                  "fixed": "b25bb2a8bda814edab39b4246d4e296330a7a29e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "2.5.0"
                      },
                      {
                        "last_affected": "2.5.11"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "2.6.0"
                      },
                      {
                        "fixed": "2.6.21"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "2.7"
                      },
                      {
                        "fixed": "2.7.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.6.20",
            "v2.7.4",
            "v2.7.3",
            "v2.7.2",
            "v2.7.1",
            "v2.6.19",
            "v2.7.0",
            "v2.6.18",
            "v2.6.17",
            "v2.6.16",
            "v2.6.15",
            "v2.6.14",
            "v2.6.13",
            "v2.5.11",
            "v2.6.12",
            "v2.6.11",
            "v2.5.10",
            "v2.6.10",
            "v2.6.9",
            "v2.6.8",
            "v2.6.7",
            "v2.6.6",
            "v2.6.5",
            "v2.6.4",
            "v2.5.9",
            "v2.6.3",
            "v2.6.2",
            "v2.6.1",
            "v2.6.0",
            "v2.5.8",
            "v2.5.7",
            "v2.5.6",
            "v2.5.5",
            "v2.5.4",
            "v2.5.3",
            "v2.5.2",
            "v2.5.1",
            "v2.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-13698.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.491931926Z",
      "provider": "osv",
      "references": [
        "https://community.openvpn.net/Security%20Announcements/CVE-2026-13698",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13698.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-13698"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-401",
          "CWE-770"
        ],
        "cna_assigner": "OpenVPN",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.5.0"
                  },
                  {
                    "last_affected": "2.5.11"
                  },
                  {
                    "introduced": "2.6.0"
                  },
                  {
                    "last_affected": "2.6.20"
                  },
                  {
                    "introduced": "2.7_alpha1"
                  },
                  {
                    "last_affected": "2.7.4"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13698.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-13698",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 516731,
  "published_at": "2026-07-06T14:13:49.479+00:00"
}