{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.27.0"
              },
              {
                "last_affected": "0.27.0"
              },
              {
                "introduced": "0.27.1"
              },
              {
                "last_affected": "0.27.1"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "4bdc8a788d2e2ce9165d552b3d4d8b72604626bf"
            },
            {
              "last_affected": "6e448d0ea9bf3d88d898b65449ca6dc2aec170ac"
            }
          ],
          "repo": "https://github.com/vllm-project/vllm",
          "type": "GIT"
        }
      ],
      "versions": [
        "0.27.0",
        "0.27.1"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulDB",
    "cwe_ids": [
      "CWE-400",
      "CWE-404"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90878.json"
  },
  "details": "A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.",
  "id": "CVE-2026-90878",
  "modified": "2026-09-17T03:30:19.181370215Z",
  "published": "2026-09-15T04:15:11.051Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vllm-project/vllm/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90878.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90878"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/cve/CVE-2026-90878"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/submit/927901"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/vuln/403472"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/vllm-project/vllm/issues/52025"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/403472/cti"
    },
    {
      "type": "FIX",
      "url": "https://github.com/vllm-project/vllm/pull/52163"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "vllm-project vLLM Jinja Template Rendering completions resource consumption"
}