gcdRadar
archive/Patch now/AIR-2026-0094
closedclosed 25 Aug 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-78684: vLLM DeepStream Decode Path Resource Control Bypass

vLLM

vLLM fails to correctly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path. Attackers can bypass resource controls to cause partial denial of service for concurrent requests.

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
6.9
EPSS
0.01 · top 51% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
25 Aug 2026
last update
25 Aug 2026
CVE ids
CVE-2026-78684other records

Timeline · 1

  1. 25 Aug 2026CVE-2026-78684: vLLM before 0.27.0 fails to properly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path.

Sources · 1

Advisories and databases

  1. 2026-08-25
    CVE-2026-78684: vLLM before 0.27.0 fails to properly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-78684

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
vllmdenial-of-service
dates
happened 25 Aug 2026 · first reported 25 Aug 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 2026-10-18 06:33Z · updated 2026-10-18 06:33Z

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-2026-78684: vLLM DeepStream Decode Path Resource Control Bypass

https://gcdradar.vercel.app/incidents/cve-2026-78684-vllm-deepstream-decode-path-resource-control · AIR-2026-0094 · closed 2026-08-25

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-08-25
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2026-78684
- CVSS: 6.9

## Summary

vLLM fails to correctly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path. Attackers can bypass resource controls to cause partial denial of service for concurrent requests.

## What to do

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

## Latest updates

- 2026-08-25: CVE-2026-78684: vLLM before 0.27.0 fails to properly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path. (https://nvd.nist.gov/vuln/detail/CVE-2026-78684)

## Sources

- 2026-08-25 NVD: CVE-2026-78684: vLLM before 0.27.0 fails to properly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path. https://nvd.nist.gov/vuln/detail/CVE-2026-78684

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

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