Is CVE-2026-40008 actively exploited?

No active exploitation of CVE-2026-40008 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40008 be exploited remotely?

Yes. CVE-2026-40008 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40008?

CVE-2026-40008 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-40008

CWE-470Published: July 10, 2026· Updated: Jul 10, 2026

9.8

CVSS v3.1

EPSS:0.33%probability of exploitation in 30 daysPercentile:25.2th

Official Description

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache IoTDB.

The pipe processor reads a fully

qualified Java class name and

instantiates it using Class.forName().newInstance() without any

validation or allowlisting.

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.

NVD Source

Risk Analysis

This critical vulnerability in Apache IoTDB allows an unauthenticated attacker to instantiate arbitrary Java classes. The pipe processor reads and instantiates fully qualified Java class names without validation, leading to 'Unsafe Reflection'. With a CVSS score of 9.8, this flaw presents an extreme risk for complete system compromise and arbitrary code execution.

No public exploit is currently known for this vulnerability. The attack vector is network-based with low complexity, indicating it is remotely exploitable.

Recommended Action

Users of Apache IoTDB should upgrade to version 2.0.10 or later to fix this unsafe reflection vulnerability. Implement strict validation and allowlisting for any class instantiation based on external input.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2026-40008 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.