What’s Vulnerable › Vulnerabilities

CVE-2026-40007: Apache IoTDB: Unauthenticated unbounded recursion in IoTDB AirGap receiver's E-language prefix parser causes per-connection StackOverflowError

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-10 · updated 2026-10-25
• Weakness: CWE-400

Description

Uncontrolled Recursion, Uncontrolled Resource Consumption vulnerability in Apache IoTDB. When pipe_air_gap_receiver_enabled=true, the IoTDB AirGap receiver's readLength method calls itself recursively each time it recognises the E-language prefix in socket data, with no depth limit. An unauthenticated attacker can send a stream of repeated E-language prefixes that drives the recursion arbitrarily deep, exhausting the receiver thread's JVM stack and raising StackOverflowError. This issue affects Apache IoTDB: from 1.0.0 before 2.0.10. Users are recommended to upgrade to version 2.0.10, which fixes the issue.

Affected products

• Apache Software Foundation Apache IoTDB: from 1.0.0 before 2.0.10 — fixed in 2.0.10

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache IoTDB 2.0.10. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/tr23kh6kp8drrsv8ypv1mqm4v5kyy23m
• http://www.openwall.com/lists/oss-security/2026/07/10/4

Get alerted when CVE-2026-40007 or the next vulnerability affects your stack