CVE-2026-40454 Memory corruption in Apache IoTDB C++ client
A malicious server can crash the Apache IoTDB C++ client by sending malformed data, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40454?
CVE-2026-40454 is a high-severity memory corruption vulnerability in Apache IoTDB C++ client, published on 10 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-40454?
How do I fix CVE-2026-40454?
No fix has been published for CVE-2026-40454 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-40454 being exploited?
There is no known exploitation of CVE-2026-40454 in the wild and no public exploit code.
Sources
Also known as GHSA-74ph-cx7x-v56m.