gcdRadar
archive/Patch now/AIR-2026-0616
closedclosed 5 May 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-44222: vLLM vulnerable to remote DoS via special-token placeholders

vLLM

Unauthenticated prompts spelling special tokens caused vLLM to index into empty grids during input-position computation. This triggered an unhandled IndexError terminating the worker and causing availability degradation.

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
6.5
EPSS
<0.01 · top 64% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
5 May 2026
last update
12 May 2026
CVE ids
CVE-2026-44222other records

Timeline · 2

  1. 5 May 2026CVE-2026-44222: vLLM Vulnerable to Remote DoS via Special-Token Placeholders
  2. 12 May 2026CVE-2026-44222: vLLM is an inference and serving engine for large language models (LLMs).

Sources · 2

Advisories and databases

  1. 2026-05-05
    CVE-2026-44222: vLLM Vulnerable to Remote DoS via Special-Token Placeholders
    GitHub Advisory Database · github.com/advisories/GHSA-hpv8-x276-m59f
  2. 2026-05-12
    CVE-2026-44222: vLLM is an inference and serving engine for large language models (LLMs).
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-44222

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
vllmdos
dates
happened 5 May 2026 · first reported 5 May 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 2026-10-18 07:00Z · updated 2026-10-18 10:04Z

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-2026-44222: vLLM vulnerable to remote DoS via special-token placeholders

https://gcdradar.vercel.app/incidents/cve-2026-44222-vllm-vulnerable-to-remote-dos-via-special-tok · AIR-2026-0616 · closed 2026-05-05

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-05-05
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2026-44222
- CVSS: 6.5

## Summary

Unauthenticated prompts spelling special tokens caused vLLM to index into empty grids during input-position computation. This triggered an unhandled IndexError terminating the worker and causing availability degradation.

## What to do

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

## Latest updates

- 2026-05-12: CVE-2026-44222: vLLM is an inference and serving engine for large language models (LLMs). (https://nvd.nist.gov/vuln/detail/CVE-2026-44222)
- 2026-05-05: CVE-2026-44222: vLLM Vulnerable to Remote DoS via Special-Token Placeholders (https://github.com/advisories/GHSA-hpv8-x276-m59f)

## Sources

- 2026-05-05 GitHub Advisory Database: CVE-2026-44222: vLLM Vulnerable to Remote DoS via Special-Token Placeholders https://github.com/advisories/GHSA-hpv8-x276-m59f
- 2026-05-12 NVD: CVE-2026-44222: vLLM is an inference and serving engine for large language models (LLMs). https://nvd.nist.gov/vuln/detail/CVE-2026-44222

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

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