CVE-2026-78684Network attack vectorHinoki check available

Partial denial of service via DeepStream backend confusion

Published Aug 25, 2026 · Updated Aug 27, 2026

Resource-consumption flaw in vLLM before 0.27.0 allows remote attackers to disrupt concurrent requests through crafted video input. VideoMediaIO.merge_kwargs treats the unregistered deepstream name as non-GPU, retains a request-level override, and its decoder skips the image-pixel limit. Reachability requires Linux x86-64 with the DeepStream extra and a video-capable model; testing demonstrated recoverable request timeouts rather than a crash or persistent outage.

CVSS severity5.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource-consumption flaw in vLLM before 0.27.0 allows remote attackers to disrupt concurrent requests through crafted video input. VideoMediaIO.merge_kwargs treats the unregistered deepstream name as non-GPU, retains a request-level override, and its decoder skips the image-pixel limit. Reachability requires Linux x86-64 with the DeepStream extra and a video-capable model; testing demonstrated recoverable request timeouts rather than a crash or persistent outage.

The record

CVE
CVE-2026-78684
Published
Aug 25, 2026
Updated
Aug 27, 2026
Vendor
vLLM Project
Product
vLLM
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.27.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

vLLM Project · vLLMversion=0 <0.27.0

Published CVSS scores

5.3GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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