UpHeron
All vulnerabilities

Servers and applications

CVE-2026-116173

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

Severity
High 8.2
Published
25 Oct 2026
Last changed
28 Oct 2026
Added to UpHeron
3 Nov 2026
Fixed in
0.24.0
Sources
NVD, CVE Program

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.

Affected software

SoftwareAffected versions
vLLMServers and applications · cna:vllm-project|vllm
  • From 0.22.0 before 0.24.0
vLLMServers and applications · cpe:a:vllm:vllm
  • From 0.22.0 before 0.24.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-116173
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-116173