{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "67d96c29fba9b72cb4c4edbc26211c208a00ebdd"
            },
            {
              "fixed": "1da94e673c257373280026f75ceb4effac80e892"
            }
          ],
          "repo": "https://github.com/vllm-project/vllm",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rxc4-3w6r-4v47"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48956.json"
  },
  "details": "vLLM is an inference and serving engine for large language models (LLMs). From 0.1.0 to before 0.10.1.1, a Denial of Service (DoS) vulnerability can be triggered by sending a single HTTP GET request with an extremely large header to an HTTP endpoint. This results in server memory exhaustion, potentially leading to a crash or unresponsiveness. The attack does not require authentication, making it exploitable by any remote user. This vulnerability is fixed in 0.10.1.1.",
  "id": "CVE-2025-48956",
  "modified": "2026-04-01T23:08:15.306560822Z",
  "published": "2025-08-21T14:41:03.889Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48956.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/vllm-project/vllm/security/advisories/GHSA-rxc4-3w6r-4v47"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-48956"
    },
    {
      "type": "FIX",
      "url": "https://github.com/vllm-project/vllm/commit/d8b736f913a59117803d6701521d2e4861701944"
    },
    {
      "type": "FIX",
      "url": "https://github.com/vllm-project/vllm/pull/23267"
    }
  ],
  "schema_version": "1.7.3",
  "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": "vLLM API endpoints vulnerable to Denial of Service Attacks"
}