CVE-2026-40452Network attack vector

Data disclosure via unchecked fastLastQuery authorization

Published Jul 10, 2026 · Updated Jul 10, 2026

Incorrect authorization in Apache IoTDB 1.3.5 through 1.3.7 and 2.0.5 through 2.0.9 allows remote authenticated users to read last-value data. The /rest/v2/fastLastQuery handler processes supplied series paths without enforcing the requesting user's data-access permissions before returning results. Any REST account can retrieve the latest values for series outside its authorized scope; no write or service-interruption impact is reported.

CVSS severity7.5
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Apache IoTDB 1.3.5 through 1.3.7 and 2.0.5 through 2.0.9 allows remote authenticated users to read last-value data. The /rest/v2/fastLastQuery handler processes supplied series paths without enforcing the requesting user's data-access permissions before returning results. Any REST account can retrieve the latest values for series outside its authorized scope; no write or service-interruption impact is reported.

The record

CVE
CVE-2026-40452
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
The Apache Software Foundation
Product
Apache IoTDB
Classifications
CWE-863, CWE-284, T1213.006
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=1.3.5 <1.3.8
  2. Affected versionversion=2.0.5 <2.0.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache IoTDBversion=1.3.5 <1.3.8; version=2.0.5 <2.0.10

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-284Improper Access Control
T1213.006Databases

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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