{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "3.4.0"
                  },
                  {
                    "fixed": "3.4.6"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "introduced": "3.5-dev"
                  },
                  {
                    "fixed": "3.5-dev9"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "introduced": "3.2.0"
                  },
                  {
                    "fixed": "3.2.17"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          "events": [
            {
              "introduced": "64a335366dc1bb5431e28a75e3a22e4226ac9b8f"
            },
            {
              "fixed": "fcfabd0d909afaf379a4e30eb43c5229ddbb9d70"
            },
            {
              "introduced": "7835e1fcbe9208d811e9d89b49e259dad97b6e96"
            },
            {
              "fixed": "37f3ad8aa35bb34b2363b73541780df6c7226270"
            },
            {
              "introduced": "e134140d282c006417945d78e7964cc8fa14586a"
            },
            {
              "fixed": "0ac41ff97e11985ec1cc8f87b7e851c308610d9d"
            }
          ],
          "repo": "https://git.haproxy.org/git/haproxy.git/",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "cwe_ids": [
      "CWE-835"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110354.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "range": [
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.0.30"
              },
              {
                "introduced": "3.2.0"
              },
              {
                "fixed": "3.2.26"
              },
              {
                "introduced": "3.3.0"
              },
              {
                "fixed": "3.3.17"
              },
              {
                "introduced": "3.0r1"
              },
              {
                "fixed": "3.0r1-362.1441"
              },
              {
                "introduced": "3.2r1"
              },
              {
                "fixed": "3.2r1-378.1259"
              },
              {
                "introduced": "3.3r1"
              },
              {
                "fixed": "3.3r1-377.1005"
              },
              {
                "introduced": "3.2.0"
              },
              {
                "fixed": "3.2.17-ee1"
              },
              {
                "introduced": "3.0"
              },
              {
                "fixed": "3.0.16-ee17"
              },
              {
                "introduced": "1.11"
              },
              {
                "fixed": "1.11.14-ee11"
              }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
          }
        ]
      }
    ]
  },
  "details": "HAProxy 3 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (persistent worker-thread CPU exhaustion) via an HTTP/1.1 chunked request. Although the H1 multiplexer drains the request before closing the stream, the parser repeatedly re-processes the same bytes without making progress. The affected thread stays busy at 100% CPU after timeouts expire and after the client disconnects, and repeated requests can consume all worker threads until the process is restarted.",
  "id": "CVE-2026-110354",
  "modified": "2026-11-01T02:30:34.880229250Z",
  "published": "2026-10-22T02:46:38.255Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://git.haproxy.org/?p=haproxy.git;a=commit;h=077906da140a35873bf451d7e9f67646c9f37c81"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110354.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110354"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.haproxy.org/git/haproxy.git"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}