CVE-2026-116173

vLLM 0.22.0 before 0.24.0 Denial of Service via gRPC output_candidates.token_ids

State: Published
Severity: 8.2 High
Published: Oct 25, 2026
Updated: Oct 26, 2026
Reserved: Oct 25, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.2 High	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	VulnCheck

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
vllmvllm-project	0.22.0 to before 0.24.0Affected 0.24.0Not affected

References

GitHub Security Advisory (GHSA-6pgw-f3pv-4h8q)vendor-advisory
VulnCheck Advisory: vLLM 0.22.0 before 0.24.0 Denial of Service via gRPC output_candidates.token_idsthird-party-advisory

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