Integer overflow in PowerDNS Authoritative - CVE-2026-33611
Published: April 22, 2026
Vulnerability identifier: #VU126866
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33611
CWE-ID: CWE-190
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 corrupt data and cause a denial of service.
The vulnerability exists due to integer overflow in HTTPS and SVCB record handling when processing crafted REST API requests. A remote privileged user can send a crafted REST API request to corrupt data and cause a denial of service.
Only systems using the LMDB backend are vulnerable to database corruption.
How to mitigate CVE-2026-33611
Install security update from vendor's website.