Security advisory

{
  "id": "60a25b66fdc8fb757efc9e5a100308c5f6c8e89e50054c87c237d7e2188cd9fa",
  "url": "https://osv.dev/vulnerability/CVE-2026-43798",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-43798",
    "summary": "A single crafted SSH message gives an unauthenticated network attacker an out-of-bounds stack write of attacker-controlled length and content against any application built on swift-nio-ssh. This vulnerability is addressed in swift-nio-ssh version 0.14.1.",
    "evidence": "osv:CVE-2026-43798",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-43798",
      "aliases": [
        "CVE-2026-43798",
        "GHSA-998x-vgvp-xwpc"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apple/swift-nio-ssh",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "31cdc3c3391a10460dedf1170530cf651d2ca496"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apple:swiftnio_ssh:*:*:*:*:*:swift:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.14.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.14.0",
            "0.13.0",
            "0.12.0",
            "0.11.0",
            "0.10.0",
            "0.9.1",
            "0.9.0",
            "0.8.0",
            "0.7.1",
            "0.7.0",
            "0.6.1",
            "0.6.0",
            "0.5.0",
            "0.4.1",
            "0.4.0",
            "0.3.3",
            "0.3.2",
            "0.3.1",
            "0.3.0",
            "0.2.1",
            "0.2.0",
            "0.1.0",
            "0.0.2",
            "0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43798.json"
          }
        }
      ],
      "modified": "2026-10-24T02:30:39.233211933Z",
      "provider": "osv",
      "references": [
        "https://github.com/apple/swift-nio-ssh/security/advisories/GHSA-998x-vgvp-xwpc"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-43798",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 428153,
  "published_at": "2026-08-20T21:17:06.58+00:00"
}