{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-115916",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-23T20:21:45.107Z",
        "datePublished": "2026-10-26T17:18:17.582Z",
        "dateUpdated": "2026-10-26T17:18:17.582Z"
    },
    "containers": {
        "cna": {
            "title": "vLLM: Out-of-vocabulary prompt token id passes input validation and triggers a CUDA device-side assert (engine crash / DoS)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-129",
                            "lang": "en",
                            "description": "CWE-129: Improper Validation of Array Index",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-193",
                            "lang": "en",
                            "description": "CWE-193: Off-by-one Error",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/vllm-project/vllm/security/advisories/GHSA-q97c-p368-75c4",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/vllm-project/vllm/security/advisories/GHSA-q97c-p368-75c4"
                },
                {
                    "name": "https://github.com/vllm-project/vllm/pull/59491",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/vllm-project/vllm/pull/59491"
                },
                {
                    "name": "https://github.com/vllm-project/vllm/commit/37cecc8141e2dcba9dd534897a164d4baaf27229",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/vllm-project/vllm/commit/37cecc8141e2dcba9dd534897a164d4baaf27229"
                },
                {
                    "name": "https://github.com/vllm-project/vllm/releases/tag/v0.32.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/vllm-project/vllm/releases/tag/v0.32.0"
                }
            ],
            "affected": [
                {
                    "vendor": "vllm-project",
                    "product": "vllm",
                    "versions": [
                        {
                            "version": "< 0.32.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-26T17:18:17.582Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "vLLM is an inference and serving engine for large language models. Prior to 0.32.0, vllm/tokenizers/hf.py computes max_token_id with an off-by-one upper bound, allowing a pre-tokenized prompt ID equal to the vocabulary size to pass validation. For a tensor-parallel size of one and an exact multiple-of-64 vocabulary, VocabParallelEmbedding.forward does not mask that value before F.embedding uses it, causing a CUDA device-side assertion and terminating the engine. This issue is fixed in version 0.32.0."
                }
            ],
            "source": {
                "advisory": "GHSA-q97c-p368-75c4",
                "discovery": "UNKNOWN"
            }
        }
    }
}