Code Injection in PowerDNS Authoritative - CVE-2026-42396
Published: May 20, 2026
Vulnerability identifier: #VU131984
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-42396
CWE-ID: CWE-94
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 cause a denial of service.
The vulnerability exists due to code injection in catalog zone label computation when processing an AXFR of a catalog zone with a member whose producer group option contains a double-quote character. A remote privileged user can provide catalog zone member data containing a double-quote character to cause a denial of service.
This issue causes the catalog zone transfer to fail.
How to mitigate CVE-2026-42396
Install security update from vendor's website.