Missing Input Validation in Threat Intel Feed Parser in OpenSearch Security Analytics Plugin

{
  "id": "af1cbffe5e5764616b43fcf8fee8290e043dd722887b82e1ffe26d4243d3d360",
  "url": "https://osv.dev/vulnerability/CVE-2026-18952",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Missing Input Validation in Threat Intel Feed Parser in OpenSearch Security Analytics Plugin",
    "summary": "Missing input validation in the threat intelligence feed parser in the OpenSearch Security Analytics plugin might allow an authenticated remote user to perform server-side request forgery and read local files via a crafted URL parameter to the threat intel source configuration endpoint.",
    "evidence": "osv:CVE-2026-18952",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-18952",
      "aliases": [
        "CVE-2026-18952",
        "GHSA-w946-8jxc-6v3m"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/opensearch-project/security-analytics",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c0de31a0e99bfc3ab8201706e4d8d74db8a0f4e6"
                },
                {
                  "fixed": "1435464d84e284d514817616c3b957228f1c5518"
                },
                {
                  "fixed": "c60816f3eab8d2ba1e505e232cbe53da85634867"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.15.0"
                      },
                      {
                        "fixed": "3.5.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.15.0"
                      },
                      {
                        "fixed": "3.7.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18952.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.539395726Z",
      "provider": "osv",
      "references": [
        "https://aws.amazon.com/security/security-bulletins/2026-079-aws/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18952.json",
        "https://github.com/opensearch-project/security-analytics/security/advisories/GHSA-w946-8jxc-6v3m",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-18952",
        "https://docs.aws.amazon.com/opensearch-service/latest/developerguide/service-software.html"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "AMZN",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18952.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-18952",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 495242,
  "published_at": "2026-08-12T18:42:38.633+00:00"
}