Apache IoTDB 1.3.5-1.3.7 / 2.0.5-2.0.9 Improper Auth: /rest/v2/fastLastQuery
CVE-2026-40452 Published on July 10, 2026
Apache IoTDB: Authorization bypass in /rest/v2/fastLastQuery exposes last-value data to unauthorized authenticated users
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.
Vulnerability Analysis
CVE-2026-40452 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Types
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-40452 has been classified to as an AuthZ vulnerability or weakness.
What is an Authorization Vulnerability?
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CVE-2026-40452 has been classified to as an Authorization vulnerability or weakness.
Products Associated with CVE-2026-40452
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Affected Versions
Apache Software Foundation Apache IoTDB:- Version 1.3.5 and below 1.3.8 is affected.
- Version 2.0.5 and below 2.0.10 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.