CVE-2026-40452
Deferred Deferred - Pending Action

Authorization Bypass in Apache IoTDB Exposes Last-Value Data

Publication date: 2026-07-10

Last updated on: 2026-07-10

Assigner: Apache Software Foundation

Description
Incorrect Authorization, Improper Access Control vulnerability in Apache IoTDB. Authorization bypass in /rest/v2/fastLastQuery exposes last-value data to unauthorized authenticated users. This issue affects Apache IoTDB: from 1.3.5 before 1.3.8, from 2.0.5 before 2.0.10. Users are recommended to upgrade to version 2.0.10, which fixes the issue.

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Meta Information

Published
2026-07-10
Last Modified
2026-07-10
Generated
2026-07-30
AI Q&A
2026-07-10
EPSS Evaluated
2026-07-28
NVD
CVE-2026-40452
EUVD
EUVD-2026-42838

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
apache iotdb From 1.3.5 (inc) to 1.3.8 (exc)
apache iotdb From 2.0.5 (inc) to 2.0.10 (exc)
apache iotdb 2.0.10

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

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Executive Summary

This vulnerability is an Incorrect Authorization and Improper Access Control issue in Apache IoTDB. Specifically, it allows authorization bypass in the /rest/v2/fastLastQuery endpoint, which exposes last-value data to unauthorized authenticated users.

Impact Analysis

The impact of this vulnerability is that unauthorized authenticated users can access sensitive last-value data that they should not be able to see. This could lead to data leakage or exposure of sensitive information managed by Apache IoTDB.

Compliance Impact

The vulnerability involves an authorization bypass that exposes last-value data to unauthorized authenticated users. This improper access control could potentially lead to unauthorized disclosure of sensitive data.

Such unauthorized data exposure may impact compliance with data protection regulations like GDPR and HIPAA, which require strict access controls and protection of personal or sensitive information.

However, the provided information does not specify exact compliance impacts or regulatory assessments related to this vulnerability.

Mitigation Strategies

To mitigate this vulnerability, users are recommended to upgrade Apache IoTDB to version 2.0.10 or later, as this version fixes the authorization bypass issue.

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