Quick answers
- Is CVE-2026-40006 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-40006 being exploited in the wild.
- How severe is CVE-2026-40006?
- Informational severity, published 10 July 2026.
- Which products and versions are affected?
- Apache Software Foundation IoTDB 1.0.0 to 2.0.9.
- Is there a fix for CVE-2026-40006?
- A patch was published on 2026-07-10: Fixed in version 2.0.10 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-40006 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-40006?
- Check whether you run Apache Software Foundation IoTDB at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
Apache IoTDB contains a resource exhaustion vulnerability (CWE-770/CWE-789) combined with missing authentication (CWE-306) in the AirGap pipe receiver. When 'pipe_air_gap_receiver_enabled' is set to true, the component listens on TCP port 9780 without requiring authentication. The 'readLength' method reads a 32-bit integer directly from the socket and passes it to 'readData', which attempts to allocate a byte array of that size without any upper-bound validation. An attacker can specify a size up to ~2GB per connection, leading to heap exhaustion and a crash of the JVM DataNode process. The issue is fixed in version 2.0.10.
Affected products
- Apache IoTDB 1.0.0 to 2.0.9
Timeline
- 2026-07-10: disclosed
- 2026-07-10: advisory
- 2026-07-10: patched: Fixed in version 2.0.10