CVE-2026-40608Public exploit

Local service crash via unbounded request-body accumulation

Published Apr 21, 2026 · Updated Apr 21, 2026

Uncontrolled resource consumption in Next AI Draw.io MCP Server 0.1.17 allows local users to crash the process with oversized POST bodies. The /api/state, /api/restore, and /api/history-svg handlers append every request chunk to an unlimited JavaScript string until V8 heap memory is exhausted. Exploitation requires access from the same host to the loopback-only sidecar on port 6002 and interrupts the active diagram session, potentially losing unsaved state.

CVSS severity6.2
Medium
EPSS probability0.15%
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 Next AI Draw.io MCP Server 0.1.17 allows local users to crash the process with oversized POST bodies. The /api/state, /api/restore, and /api/history-svg handlers append every request chunk to an unlimited JavaScript string until V8 heap memory is exhausted. Exploitation requires access from the same host to the loopback-only sidecar on port 6002 and interrupts the active diagram session, potentially losing unsaved state.

The record

CVE
CVE-2026-40608
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
Dayuan Jiang
Product
Next AI Draw.io
Classifications
CWE-400, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 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=< 0.4.15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Dayuan Jiang · Next AI Draw.ioversion=< 0.4.15

Published CVSS scores

6.2DayuanJiang via GitHub Security AdvisoryCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
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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