Improper Validation of Array Index in ollama/ollama

{
  "id": "cc09ad3c9d8071f5da042ad76dea07b7fb9c2a20d0cfaed3dc7fc2fe0c58f1bd",
  "url": "https://osv.dev/vulnerability/CVE-2025-1975",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Improper Validation of Array Index in ollama/ollama",
    "summary": "A vulnerability in the Ollama server version 0.5.11 allows a malicious user to cause a Denial of Service (DoS) attack by customizing the manifest content and spoofing a service. This is due to improper validation of array index access when downloading a model via the /api/pull endpoint, which can lead to a server crash.",
    "evidence": "osv:CVE-2025-1975",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-1975",
      "aliases": [
        "CVE-2025-1975",
        "GHSA-wrh5-cmwx-q2qr",
        "GO-2025-3695"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ollama/ollama",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f8453e9d4a15f5f54b610993e8647d252cb65626"
                },
                {
                  "last_affected": "f8453e9d4a15f5f54b610993e8647d252cb65626"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ollama:ollama:0.5.11:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.5.11"
                      },
                      {
                        "last_affected": "0.5.11"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.5.11",
            "v0.5.11"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-1975.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.010263514Z",
      "provider": "osv",
      "references": [
        "https://huntr.com/bounties/921ba5d4-f1d0-4c66-9764-4f72dffe7acd",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/1xxx/CVE-2025-1975.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-1975"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-129"
        ],
        "cna_assigner": "@huntr_ai",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/1xxx/CVE-2025-1975.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-1975",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519881,
  "published_at": "2025-05-16T08:25:57.177+00:00"
}