OWASP Coraza WAF: Resource exhaustion via deferred file handle accumulation in multipart body processor

{
  "id": "7803c288fddc730be7e73e5db1dbbb1196ce830497eb09ba6045642f481056fd",
  "url": "https://osv.dev/vulnerability/CVE-2026-107834",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OWASP Coraza WAF: Resource exhaustion via deferred file handle accumulation in multipart body processor",
    "summary": "OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. From 3.0.0 until 3.8.0, the multipart loop in internal/bodyprocessors/multipart.go executes defer temp.Close() for every uploaded file part, so each temporary-file descriptor remains open until the complete request returns. An unauthenticated attacker can submit a multipart body containing many minimal file parts and exhaust the process file-descriptor table within the request-body size limit, causing os.CreateTemp failures, MULTIPART_STRICT_ERROR responses, blocked legitimate uploads, and process-wide inability to open files or sockets. This issue is fixed in version 3.8.0.",
    "evidence": "osv:CVE-2026-107834",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-107834",
      "aliases": [
        "CVE-2026-107834",
        "GHSA-rp9v-7xv3-r6g3",
        "GO-2026-6697"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/corazawaf/coraza",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ad50864cfa00f5143fff7f6877847326fdc4b394"
                },
                {
                  "fixed": "19b86824f5e97eba72b289a81d5b3c1260292ff0"
                },
                {
                  "fixed": "1bc39036e99c88e7de60cf8e6bb55ee4c311223c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "3.8.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1bc39036e99c88e7de60cf8e6bb55ee4c311223c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "19b86824f5e97eba72b289a81d5b3c1260292ff0"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v3.8.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.7.0",
            "v3.6.0",
            "v3.5.0",
            "v3.4.0",
            "v3.3.3",
            "v3.3.2",
            "v3.3.1",
            "v3.3.0",
            "v3.2.1",
            "v3.2.0",
            "v3.1.0",
            "v3.0.4",
            "v3.0.3",
            "v3.0.2",
            "v3.0.1",
            "v3.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107834.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.828044371Z",
      "provider": "osv",
      "references": [
        "https://github.com/corazawaf/coraza/releases/tag/v3.8.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107834.json",
        "https://github.com/corazawaf/coraza/security/advisories/GHSA-rp9v-7xv3-r6g3",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-107834",
        "https://github.com/corazawaf/coraza/commit/1bc39036e99c88e7de60cf8e6bb55ee4c311223c"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-400",
          "CWE-772"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107834.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-107834",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490300,
  "published_at": "2026-10-09T17:41:07.802+00:00"
}