CVE-2026-23906
LDAP anonymous bind bypass enables auth bypass in Apache Druid
Is CVE-2026-23906 being exploited?
Not confirmed. CVE-2026-23906 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.1% probability of exploitation in the next 30 days.
How severe is CVE-2026-23906?
CVE-2026-23906 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-23906?
Yes. A fix has been recorded for CVE-2026-23906. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-23906 affect?
CVE-2026-23906 affects Apache Druid (0.17.0–35.x), druid-basic-security extension, LDAP with anonymous binds. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-23906?
Upgrade to 36.0.0+; disable anonymous LDAP binds
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote unauthenticated access to Druid cluster; data exposure, query execution, and potential admin access.
Immediate action required
- affected>= 0.17.0 and < 36.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.