Apache IoTDB C++ Client OOB Read before 1.3.8 & 2.0.10
CVE-2026-40454 Published on July 10, 2026
Apache IoTDB C++ client: Out-of-bounds reads in C++ client TsBlock deserializer crash client process on malformed server data
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.
Weakness Types
Out-of-bounds Read
The software reads data past the end, or before the beginning, of the intended buffer. Typically, this can allow attackers to read sensitive information from other memory locations or cause a crash. A crash can occur when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string. The expected sentinel might not be located in the out-of-bounds memory, causing excessive data to be read, leading to a segmentation fault or a buffer overflow. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent read operation then produces undefined or unexpected results.
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-40454
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Affected Versions
Apache Software Foundation Apache IoTDB C++ client:- Version 1.3.5 and below 1.3.8 is affected.
- Version 2.0.5 and below 2.0.10 is affected.