8.2 High

vLLM from 0.22.0 before 0.24.0 contains a denial of service vulnerability that allows remote attackers to terminate EngineCore by bypassing…

CVE-2026-116173

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

Part of the AI stack

This affects vLLM, in Inference & serving.

Assessment

CVSS: 8.2 (v4.0)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 25 October 2026
Last updated: 28 October 2026
Weakness: CWE-20
Assigner: disclosure@vulncheck.com

CVSS vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

At the source

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