CVE-2026-40009Network attack vector

Authenticated full tree-path access via reserved username

Published Jul 10, 2026 · Updated Jul 10, 2026

Improper access control in Apache IoTDB 2.0.8 through 2.0.9 allows remote authenticated users to obtain full tree-path access. The user-renaming operation accepts the reserved __internal_auditor identity, after which authorization treats the renamed account as the internal auditor. Any authenticated account that can rename itself can read data across all tree paths, with no reported ability to modify data or interrupt service.

CVSS severity6.5
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Apache IoTDB 2.0.8 through 2.0.9 allows remote authenticated users to obtain full tree-path access. The user-renaming operation accepts the reserved __internal_auditor identity, after which authorization treats the renamed account as the internal auditor. Any authenticated account that can rename itself can read data across all tree paths, with no reported ability to modify data or interrupt service.

The record

CVE
CVE-2026-40009
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
The Apache Software Foundation
Product
Apache IoTDB
Classifications
CWE-284, CWE-269, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 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=2.0.8 <2.0.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache IoTDBversion=2.0.8 <2.0.10

Published CVSS scores

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

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-269Improper Privilege Management
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

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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