Security advisory

{
  "id": "168ddad3d59f30d83688e32d416d99e1dc840843a89ff38c19df82e675eae4d3",
  "url": "https://osv.dev/vulnerability/CVE-2026-78135",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-78135",
    "summary": "libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authentication bypass.",
    "evidence": "osv:CVE-2026-78135",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-78135",
      "aliases": [
        "CVE-2026-78135"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/strongswan/strongswan",
              "type": "GIT",
              "events": [
                {
                  "introduced": "49ddfe91f0958555a39b1234424967de85b59276"
                },
                {
                  "fixed": "b43f6bfeed34b4afc8a7eb0c0de38e6e70177847"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.9.7"
                      },
                      {
                        "last_affected": "6.0.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b43f6bfeed34b4afc8a7eb0c0de38e6e70177847"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "6.1.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "6.1.0rc1",
            "6.0.7",
            "6.0.6",
            "6.0.5",
            "6.0.5dr1",
            "6.0.4",
            "6.0.4rc1",
            "android-2.6.2",
            "android-2.6.1",
            "6.0.3",
            "6.0.3rc1",
            "android-2.6.0",
            "6.0.3dr1",
            "6.0.2",
            "6.0.2rc1",
            "6.0.2dr3",
            "android-2.5.6",
            "6.0.2dr2",
            "6.0.2dr1",
            "android-2.5.5",
            "6.0.1",
            "6.0.1rc1",
            "android-2.5.4",
            "android-2.5.3",
            "6.0.0",
            "6.0.0rc2",
            "6.0.0rc1",
            "android-2.5.2",
            "5.9.14",
            "5.9.14rc1",
            "android-2.5.1",
            "5.9.14dr1",
            "android-2.5.0",
            "5.9.13",
            "5.9.13rc1",
            "5.9.12",
            "5.9.12rc1",
            "5.9.12dr2",
            "5.9.12dr1",
            "android-2.4.2",
            "5.9.11",
            "5.9.11rc1",
            "5.9.11dr3",
            "5.9.11dr2",
            "5.9.11dr1",
            "5.9.10",
            "5.9.10rc1",
            "android-2.4.1-1",
            "android-2.4.1",
            "android-2.4.0",
            "5.9.9",
            "5.9.9rc2",
            "5.9.9rc1",
            "5.9.8",
            "5.9.8rc1",
            "5.9.8dr4",
            "5.9.8dr3",
            "5.9.8dr2",
            "5.9.8dr1",
            "5.9.7"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78135.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.998897737Z",
      "provider": "osv",
      "references": [
        "https://github.com/strongswan/strongswan/releases/tag/6.1.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78135.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-78135",
        "https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78135).html"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-841"
        ],
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78135.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-78135",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506713,
  "published_at": "2026-09-11T02:07:28.763+00:00"
}