Medium severity · published Apr 22, 2026
CVE-2026-33609
LDAP DN injection
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AU
Authoritative · PowerDNS
5.0.0 before 5.0.4; 4.9.0 before 4.9.14 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33609
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33609
Broken Link
https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-05.html
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