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archive/Patch now/AIR-2026-1503
closedclosed 25 Oct 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-116172: vLLM Rust gRPC converter allows max_logprobs limit bypass and engine crash

vLLM

Improper input validation in vLLM allows remote attackers to send oversized top_n values via gRPC. This triggers torch.topk failures that terminate the engine core.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
8.2
EPSS
<0.01 · top 73% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
25 Oct 2026
last update
25 Oct 2026
CVE ids
CVE-2026-116172other records

Timeline · 1

  1. 25 Oct 2026CVE-2026-116172: vLLM from 0.22.0 before 0.24.0 contains an improper input validation vulnerability in the Rust gRPC converter that allows remote…

Sources · 1

Advisories and databases

  1. 2026-10-25
    CVE-2026-116172: vLLM from 0.22.0 before 0.24.0 contains an improper input validation vulnerability in the Rust gRPC converter that allows remote…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-116172

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
denial-of-servicevllm
dates
happened 25 Oct 2026 · first reported 25 Oct 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-25 16:18Z · updated 2026-10-25 16:18Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-116172: vLLM Rust gRPC converter allows max_logprobs limit bypass and engine crash

https://gcdradar.vercel.app/incidents/cve-2026-116172-vllm-rust-grpc-converter-allows-max-logprobs · AIR-2026-1503 · closed 2026-10-25

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-10-25
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2026-116172
- CVSS: 8.2

## Summary

Improper input validation in vLLM allows remote attackers to send oversized top_n values via gRPC. This triggers torch.topk failures that terminate the engine core.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-10-25: CVE-2026-116172: vLLM from 0.22.0 before 0.24.0 contains an improper input validation vulnerability in the Rust gRPC converter that allows remote… (https://nvd.nist.gov/vuln/detail/CVE-2026-116172)

## Sources

- 2026-10-25 NVD: CVE-2026-116172: vLLM from 0.22.0 before 0.24.0 contains an improper input validation vulnerability in the Rust gRPC converter that allows remote… https://nvd.nist.gov/vuln/detail/CVE-2026-116172

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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