LDAP injection in PowerDNS Authoritative - CVE-2026-33609
Published: April 22, 2026
Vulnerability identifier: #VU126868
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33609
CWE-ID: CWE-90
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: PowerDNS.COM B.V.
Affected software:
PowerDNS Authoritative
PowerDNS Authoritative
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to ldap dn injection in LDAP query escaping when processing regular DNS queries. A remote user can send crafted queries to disclose sensitive information.
Exploitation requires the LDAP backend with 8bit-dns enabled.
How to mitigate CVE-2026-33609
Install security update from vendor's website.