CVE-2026-116173

Affects: vLLM

CVSS: MEDIUM · 5.9v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-10-25
Weakness: CWE-20
Source: nvd.nist.gov/vuln/detail/CVE-2026-116173

Description

vLLM from 0.22.0 before 0.24.0 contains a denial of service vulnerability that allows remote attackers to terminate EngineCore by bypassing logprob_token_ids limits in the Rust gRPC frontend. Attackers can send Generate or GenerateStream requests with output_logprobs enabled and more than 128 output_candidates.token_ids, triggering a fatal sampler exception that crashes the engine.

References

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