{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "cpe": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*",
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "3.6.13"
                  }
                ],
                "source": "CPE_RANGE"
              },
              {
                "cpe": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*",
                "range": [
                  {
                    "introduced": "4.0.0"
                  },
                  {
                    "fixed": "4.1.9"
                  }
                ],
                "source": "CPE_RANGE"
              },
              {
                "cpe": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*",
                "range": [
                  {
                    "introduced": "4.2.0"
                  },
                  {
                    "fixed": "4.2.4"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8999af05d26ef2e63dc4c77a798595e2a53435ad"
            },
            {
              "introduced": "02310e95fe74c0c031f540f3284e4a9bd856ced2"
            },
            {
              "fixed": "043829b193a6ead389864e636a07ddf6bfa2ca8a"
            },
            {
              "introduced": "04ccbfd709eef8f4af53d6237514fbe9db7ea81f"
            },
            {
              "fixed": "5e324f121104cc76af1b8f3ec0d1a20ef9e98c3b"
            }
          ],
          "repo": "https://github.com/apache/cxf",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "apache",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107937.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "range": [
              {
                "introduced": "4.2.0"
              },
              {
                "fixed": "4.2.4"
              },
              {
                "introduced": "4.0.0"
              },
              {
                "fixed": "4.1.9"
              },
              {
                "fixed": "3.6.13"
              }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
          }
        ]
      }
    ]
  },
  "details": "In Apache CXF, the parser for multipart/MTOM attachment part headers did not fully enforce the configured attachment-max-header-size (default 300 characters) and attachment-headers-max-count (default 500) limits. The size limit was applied only to each physical line, not to a header value built from continuation lines or to the combined values of a repeated header. The count limit was checked against the number of distinct header names, not the total number of header lines. A remote, unauthenticated attacker could send a multipart request with very large folded or repeated part headers. The server would then allocate memory without bound, causing a denial of service. \nUsers are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.",
  "id": "CVE-2026-107937",
  "modified": "2026-10-24T10:30:17.213203083Z",
  "published": "2026-10-09T10:19:53.377Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/10/09/12"
    },
    {
      "type": "WEB",
      "url": "https://repo.maven.apache.org/maven2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107937.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread.html/x9twtpv3d04qj83t6w9xkh9y2q28zztj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107937"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache CXF: The attachment header size and count limits can be bypassed, which allows denial of service through memory exhaustion."
}