CVE-2026-40454

High

Description

Out-of-bounds Read, Improper Input Validation vulnerability in Apache IoTDB C++ client. Out-of-bounds reads in IoTDB C++ client TsBlock deserializer crash client process on malformed server data. This issue affects Apache IoTDB C++ client: 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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductApache IoTDB C++ client

PublishedJul 10, 2026

First seenJul 10, 2026

Weakness typeCWE-125Out-of-bounds read CWE-20Improper input validation

How to fix

Update

Apache Software Foundation Apache IoTDB C++ client1.3.8, 2.0.10 or later

Vendor advisories

lists.apache.org/thread/9wml325g6bpovw0jf5ymtc3xl7fwlkrn

Affected products

Product	Affected versions	Fixed in
Apache Software Foundation Apache IoTDB C++ client	1.3.5 ≤ v < 1.3.8, 2.0.5 ≤ v < 2.0.10	1.3.8, 2.0.10

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