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CVE-2026-40452— Apache IoTDB: Authorization bypass in /rest/v2/fastLastQuery exposes last-value data to unauthorized authenticated users

Quick assessment

Affected
Apache Software Foundation Apache IoTDB
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache iotdb是美国Apache基金会开源的一款物联网数据库。 Apache IoTDB 1.3.5版本至1.3.8之前版本和2.0.5版本至2.0.10之前版本存在安全漏洞，该漏洞源于授权不正确和访问控制不当，可能导致未经授权的已认证用户在/rest/v2/fastLastQuery中绕过授权，暴露最新的数据值。

AI Predicted 6.5 Difficulty: Easy EPSS 0.43% · P38

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 2

VendorProduct Version RangeStatus
Apache Software Foundation Apache IoTDB 1.3.5< 1.3.8 affected
2.0.5< 2.0.10 affected
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I. Basic Information for CVE-2026-40452

Vulnerability Information
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Vulnerability Title
Apache IoTDB: Authorization bypass in /rest/v2/fastLastQuery exposes last-value data to unauthorized authenticated users
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Apache IoTDB 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache iotdb是美国Apache基金会开源的一款物联网数据库。 Apache IoTDB 1.3.5版本至1.3.8之前版本和2.0.5版本至2.0.10之前版本存在安全漏洞，该漏洞源于授权不正确和访问控制不当，可能导致未经授权的已认证用户在/rest/v2/fastLastQuery中绕过授权，暴露最新的数据值。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache IoTDB 1.3.5 ~ 1.3.8 -

II. Public POCs for CVE-2026-40452

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III. Intelligence Information for CVE-2026-40452

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Mailing List Discussions for CVE-2026-40452 (1)

Same Patch Batch · Apache Software Foundation · 2026-07-10 · 9 CVEs total

CVE-2026-49844 6.3 MEDIUM Apache Log4j API: Improper serialization of non-finite floating-point values in MapMessage
CVE-2026-40454 Apache IoTDB C++ client: Out-of-bounds reads in C++ client TsBlock deserializer crash clie
CVE-2026-40009 Apache IoTDB: Authenticated users can escalate to full tree-path access by renaming themse
CVE-2026-40008 Apache IoTDB: Arbitrary Class Instantiation via Pipe Transfer RPC
CVE-2026-40007 Apache IoTDB: Unauthenticated unbounded recursion in IoTDB AirGap receiver's E-language pr
CVE-2026-40006 Apache IoTDB: Unauthenticated heap-exhaustion DoS via unbounded allocation in IoTDB AirGap
CVE-2026-40005 Apache IoTDB: Path Traversal in Pipe File Transfer Receiver
CVE-2026-28564 Apache IoTDB: REST Basic Authentication Accepts Stale Cached Credentials

IV. Related Vulnerabilities

Same product: Apache IoTDB
Same vendor: Apache Software Foundation
Same weakness: CWE-863