Apache Tomcat: DoS via integer overflow in multipart file upload

{
  "id": "1b5a4dab9a60038c821db583a773fb3246f4b45e5f4d0200f4e06cb0a7014ebd",
  "url": "https://osv.dev/vulnerability/CVE-2025-52520",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache Tomcat: DoS via integer overflow in multipart file upload",
    "summary": "For some unlikely configurations of multipart upload, an Integer Overflow vulnerability in Apache Tomcat could lead to a DoS via bypassing of size limits. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.",
    "evidence": "osv:CVE-2025-52520",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-52520",
      "aliases": [
        "BIT-tomcat-2025-52520",
        "CVE-2025-52520",
        "GHSA-wr62-c79q-cv37"
      ],
      "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/tomcat",
              "type": "GIT",
              "events": [
                {
                  "introduced": "16bf392c67833ad549733b58c350ff92b5ee782a"
                },
                {
                  "fixed": "43d5ad023d2eee2ca162eded597a23afa0b92296"
                },
                {
                  "introduced": "e9d17cddc285615807ec5fef09240777436b25dc"
                },
                {
                  "fixed": "e6c2a4b773a2bf03f94a31ed8fc30df1a735217e"
                },
                {
                  "introduced": "56e547d387ab49f688c93fe9ca082b1b5d94deed"
                },
                {
                  "fixed": "2640cdf945fd8b715cec93e6c7840970a13634a0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "9.0.0"
                      },
                      {
                        "fixed": "9.0.107"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "10.1.0"
                      },
                      {
                        "fixed": "10.1.43"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "11.0.0"
                      },
                      {
                        "fixed": "11.0.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-52520.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.403348265Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/52xxx/CVE-2025-52520.json",
        "https://lists.apache.org/thread/trqq01bbxw6c92zx69kx2mw2qgmfy0o5",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-52520"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-190"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "11.0.0-M1"
                  },
                  {
                    "last_affected": "11.0.8"
                  },
                  {
                    "introduced": "10.1.0-M1"
                  },
                  {
                    "last_affected": "10.1.42"
                  },
                  {
                    "introduced": "9.0.0.M1"
                  },
                  {
                    "last_affected": "9.0.106"
                  },
                  {
                    "introduced": "8.5.0"
                  },
                  {
                    "last_affected": "8.5.100"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/52xxx/CVE-2025-52520.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-52520",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496373,
  "published_at": "2025-07-10T19:05:41.637+00:00"
}