vllm — security advisory

{
  "id": "6c70714188ed2326856a69ec95d8ec07cad43f69c51352e69e76f24e1e1bb892",
  "url": "https://osv.dev/vulnerability/PYSEC-2026-4185",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "PYSEC-2026-4185",
    "summary": "vLLM versions 0.22.0 through 0.23.0 fail to validate stop_token_ids against vocabulary bounds in Rust HTTP and gRPC frontends, allowing out-of-vocabulary token IDs to reach MinTokensLogitsProcessor. Attackers can submit requests with min_tokens greater than zero and out-of-vocabulary stop_token_ids to trigger CUDA tensor indexing failures that leave EngineCore in a fatal state requiring service restart.",
    "evidence": "osv:PYSEC-2026-4185",
    "products": [
      {
        "name": {
          "value": "vllm",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.24.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "0.22.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.22.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.23.0",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "PYSEC-2026-4185",
      "aliases": [
        "CVE-2026-100652",
        "GHSA-qff2-492f-9fm4",
        "PYSEC-2026-4185"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0.22.0"
                },
                {
                  "fixed": "0.24.0"
                }
              ]
            }
          ],
          "package": {
            "name": "vllm",
            "purl": "pkg:pypi/vllm",
            "ecosystem": "PyPI"
          },
          "versions": [
            "0.22.0",
            "0.22.1",
            "0.23.0"
          ],
          "database_specific": {
            "source": "https://github.com/pypa/advisory-database/blob/main/vulns/vllm/PYSEC-2026-4185.yaml"
          },
          "ecosystem_specific": {}
        }
      ],
      "modified": "2026-10-07T10:00:03.378975746Z",
      "provider": "osv",
      "references": [
        "https://www.vulncheck.com/advisories/vllm-0.22.0-through-0.23.0-denial-of-service-via-stop-token-ids",
        "https://github.com/vllm-project/vllm/security/advisories/GHSA-qff2-492f-9fm4"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-100652",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 94682,
  "published_at": "2026-09-26T14:16:47.81+00:00"
}