Apache Traffic Server: DoS vulnerability in HTTP/2 via stalled flow-control conditions

{
  "id": "91a9a3dcc46ab26f472ef74ee6ebc5f0132c76db048be489f8a7707881c8acb4",
  "url": "https://osv.dev/vulnerability/CVE-2026-59173",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache Traffic Server: DoS vulnerability in HTTP/2 via stalled flow-control conditions",
    "summary": "Uncontrolled Resource Consumption vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.0.0 through 9.1.13, from 10.0.0 through 10.1.2. Users are recommended to upgrade to version 9.1.14 or 10.1.3, which fixes the issue.",
    "evidence": "osv:CVE-2026-59173",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-59173",
      "aliases": [
        "CVE-2026-59173"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/trafficserver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b14030656330ed623cd1f9efe2f4f9abd9d16e29"
                },
                {
                  "fixed": "056a39fb8c468a89a98be004ad6ae28b3d435c08"
                },
                {
                  "introduced": "3fa146678bc6a061722f4ea930998ae29ad70de3"
                },
                {
                  "fixed": "52f3d2929555b8aa9575f691a27dc3eca4b9bf75"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "9.0.0"
                      },
                      {
                        "fixed": "9.2.14"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "10.0.0"
                      },
                      {
                        "fixed": "10.1.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59173.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.717787442Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59173.json",
        "https://lists.apache.org/thread/lhlbhphmv5dsfgx1fx84mgonzbocpzhd",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-59173"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-400"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0.0"
                  },
                  {
                    "last_affected": "9.2.13"
                  },
                  {
                    "introduced": "10.0.0"
                  },
                  {
                    "last_affected": "10.1.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59173.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-59173",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 487886,
  "published_at": "2026-07-18T12:52:18.923+00:00"
}