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    CVE-2026-115916

    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.

    Published:Oct 26, 2026
    Last Modified:Nov 2, 2026
    EPS:Oct 26, 2026
    EPSS Score:0.00312
    CVSS Score:6.5

    Affected Products

    Vendor
    Vllm
    Product
    Vllm
    Vendor
    Vllm-project
    Product
    Vllm

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-100 Overflow Buffers

    Related CVEs

    CVE-2026-115918 (CVSS 6.5) — vLLM is an inference and serving engine for large language models. From 0.16.0 until 0.32.0, the /v1/responses…
    CVE-2026-115917 (CVSS 3.4) — vLLM is an inference and serving engine for large language models. Prior to 0.32.0, the OpenAI-compatible serv…
    CVE-2026-115915 (CVSS 8.1) — vLLM is an inference and serving engine for large language models. Prior to 0.32.0, ImageMediaIO passes attack…
    CVE-2026-115914 (CVSS 6.5) — vLLM is an inference and serving engine for large language models. From 0.11.1 until 0.32.0, the DeepSeek-OCR,…
    CVE-2026-115913 (CVSS 6.5) — vLLM is an inference and serving engine for large language models. Prior to 0.32.0, the Phi-4 multimodal audio…
    CVE-2026-115912 (CVSS 7.5) — vLLM is an inference and serving engine for large language models. Prior to 0.32.0, an authenticated caller ca…
    CVE-2026-115911 (CVSS 6.5) — vLLM is an inference and serving engine for large language models. From 0.19.0 until 0.32.0, authenticated cal…
    CVE-2026-116180 (CVSS 8.3) — vLLM from 0.8.5 before 0.31.0 has a denial of service flaw. LogprobsTensors.empty_cpu() in vllm/v1/outputs.py …
    CVE-2026-116181 (CVSS 7.1) — vLLM from 0.20.1 before 0.29.0 contains an improper input validation vulnerability that allows remote attacker…
    CVE-2026-116179 (CVSS 8.7) — vLLM from 0.18.0 before 0.31.0 contains a resource exhaustion vulnerability that allows API clients to bypass …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High