CVE-2026-55646Public exploitNetwork attack vector

Service interruption via unbounded audio upload read

Published Jul 6, 2026 · Updated Jul 6, 2026

Uncontrolled resource consumption in vLLM 0.22.0 through 0.23.0 allows attackers to interrupt service via oversized audio uploads. The transcription and translation routes call request.file.read() without a size bound, fully materializing the upload before _preprocess_speech_to_text() applies the configured compressed-file limit. Exploitation requires exposed speech-to-text routes, a compatible model, and any required API key; memory pressure can terminate the process under deployment limits or concurrent requests.

CVSS severity6.5
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in vLLM 0.22.0 through 0.23.0 allows attackers to interrupt service via oversized audio uploads. The transcription and translation routes call request.file.read() without a size bound, fully materializing the upload before _preprocess_speech_to_text() applies the configured compressed-file limit. Exploitation requires exposed speech-to-text routes, a compatible model, and any required API key; memory pressure can terminate the process under deployment limits or concurrent requests.

The record

CVE
CVE-2026-55646
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
vLLM Project
Product
vLLM
Classifications
CWE-400, CWE-770, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 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=>= 0.22.0, < 0.24.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

vLLM Project · vLLMversion=>= 0.22.0, < 0.24.0

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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