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    CVE-2026-93840

    vLLM before 0.29.0 validates allowed_token_ids against tokenizer length instead of model output logits width in SamplingParams._validate_allowed_token_ids(). Attackers can supply token IDs above the output vocabulary that pass validation, causing LogitBiasState to corrupt GPU logits state and allow concurrent requests to sample tokens outside their allowlists.

    Published:Sep 18, 2026
    Last Modified:Sep 22, 2026
    EPS:Sep 18, 2026
    EPSS Score:0.00248
    CVSS Score:3.7

    Affected Products

    Vendor
    Vllm
    Product
    Vllm

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-100 Overflow Buffers

    Related CVEs

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    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…
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    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