What is CVE-2026-40452?

CVE-2026-40452 is a high-severity vulnerability in Apache Software Foundation Iotdb, classified under Improper Access Control. CVSS score: 7.5/10. Published 2026-07-10.

How severe is CVE-2026-40452?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Apache Software Foundation Iotdb

CVE-2026-40452

Incorrect Authorization, Improper Access Control vulnerability in Apache IoTDB. Authorization bypass in /rest/v2/fastLastQuery exposes last-value data to unauthorized authenticated users. This issue affects Apache IoTDB: 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.

EPSS: 0.003 (21.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Apache Software Foundation Iotdb — versions 1.3.5, 2.0.5

Weakness classification (CWE)

References

security@apache.org (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-40452?: CVE-2026-40452 is a high-severity vulnerability in Apache Software Foundation Iotdb, classified under Improper Access Control. CVSS score: 7.5/10. Published 2026-07-10.
How severe is CVE-2026-40452?: High severity. CVSS v3 base score is 7.5 out of 10.