CVE-2026-33609: LDAP DN injection

Published Apr 22, 2026
·
Updated

Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.

Affected Software

2 affected components
PowerDNS Authoritative>=4.9.0<4.9.14
PowerDNS Authoritative>=5.0.0<5.0.4

Event History

Apr 22, 2026
CVE Published
via MITRE·02:00 PM
Data Sourced
via MITRE·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·02:16 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-33609?

CVE-2026-33609 is classified as a high-severity LDAP DN injection vulnerability.

2

How do I fix CVE-2026-33609?

To fix CVE-2026-33609, upgrade PowerDNS Authoritative to versions 4.9.14 or 5.0.4 or later.

3

What causes the CVE-2026-33609 vulnerability?

CVE-2026-33609 is caused by incomplete escaping of LDAP queries when 8bit-dns is enabled.

4

Which versions of PowerDNS are affected by CVE-2026-33609?

PowerDNS versions 4.9.0 to 4.9.14 and 5.0.0 to 5.0.4 are affected by CVE-2026-33609.

5

Is CVE-2026-33609 exploitable remotely?

Yes, CVE-2026-33609 is exploitable remotely, allowing users to perform unauthorized LDAP queries.

Company

Resources

Contact

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CVE-2026-33609 - LDAP DN injection - SecAlerts