gcdRadar
archive/Patch now/AIR-2026-1486
closedclosed 21 Oct 2026Patch now2 Disclosed vulnerabilityAI

vLLM Denial of Service through Multimodal UUID Cache Desynchronization

vLLM

A cache identity vulnerability in vLLM permits unauthenticated attackers to desynchronize multimodal processor caches. This triggers a fatal token mismatch that crashes the serving instance.

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

fix status
Fix status unknown
first report
21 Oct 2026
last update
21 Oct 2026

Timeline · 1

  1. 21 Oct 2026GHSA-hfwf-hgvp-4rr8: Duplicate Advisory: vLLM vulnerable to remote denial of service through forged multimodal UUID cache desynchronization

Sources · 1

Advisories and databases

  1. 2026-10-21
    GHSA-hfwf-hgvp-4rr8: Duplicate Advisory: vLLM vulnerable to remote denial of service through forged multimodal UUID cache desynchronization
    GitHub Advisory Database · github.com/advisories/GHSA-hfwf-hgvp-4rr8

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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
dosvllm
dates
happened 21 Oct 2026 · first reported 21 Oct 2026
origin
GitHub Advisory Database
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 2026-10-23 22:00Z · updated 2026-10-23 22:00Z

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
# vLLM Denial of Service through Multimodal UUID Cache Desynchronization

https://gcdradar.vercel.app/incidents/vllm-denial-of-service-through-multimodal-uuid-cache-desynch · AIR-2026-1486 · closed 2026-10-21

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-10-21
- AI role: Attack on AI
- Products: vLLM

## Summary

A cache identity vulnerability in vLLM permits unauthenticated attackers to desynchronize multimodal processor caches. This triggers a fatal token mismatch that crashes the serving instance.

## What to do

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

## Latest updates

- 2026-10-21: GHSA-hfwf-hgvp-4rr8: Duplicate Advisory: vLLM vulnerable to remote denial of service through forged multimodal UUID cache desynchronization (https://github.com/advisories/GHSA-hfwf-hgvp-4rr8)

## Sources

- 2026-10-21 GitHub Advisory Database: GHSA-hfwf-hgvp-4rr8: Duplicate Advisory: vLLM vulnerable to remote denial of service through forged multimodal UUID cache desynchronization https://github.com/advisories/GHSA-hfwf-hgvp-4rr8

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

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