What is CVE-2026-23906?

CVE-2026-23906 is a critical-severity vulnerability in Apache Druid, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-02-10.

How severe is CVE-2026-23906?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Apache Druid

CVE-2026-23906

Affected Products and Versions * Apache Druid * Affected Versions: 0.17.0 through 35.x (all versions prior to 36.0.0) * Prerequisites: * druid-basic-security extension enabled * LDAP authenticator configured * Underlying L…

Vulnerability class: Broken Authentication

EPSS: 0.010 (59.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Druid
Apache Software Foundation Druid — versions 0.17.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-23906?: CVE-2026-23906 is a critical-severity vulnerability in Apache Druid, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-02-10.
How severe is CVE-2026-23906?: Critical severity. CVSS v3 base score is 9.8 out of 10.