Acceptance of Extraneous Untrusted Data With Trusted Data in PowerDNS Recursor - CVE-2026-33612

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Main Vulnerability Database Vulnerabilities #VU135382

Acceptance of Extraneous Untrusted Data With Trusted Data in PowerDNS Recursor - CVE-2026-33612

Published: June 25, 2026


Vulnerability identifier: #VU135382
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-33612
CWE-ID: CWE-349
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: PowerDNS.COM B.V.
Affected software:
PowerDNS Recursor

Detailed vulnerability description

The vulnerability allows a remote attacker to poison the cache.

The vulnerability exists due to acceptance of extraneous untrusted data in the ZoneToCache function when processing a crafted zone. A remote attacker can send a crafted zone to poison the cache.

Only configurations that use ZoneToCache are vulnerable.


How to mitigate CVE-2026-33612

Install security update from vendor's website.

Sources