Insufficient Verification of Data Authenticity Affecting pdns-recursor package, versions [5.2.0,5.2.11)[5.3.0,5.3.8)[5.4.0,5.4.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-PDNSRECURSOR-17660834
- published28 Jun 2026
- disclosed25 Jun 2026
- creditDanial Mahadzir
Introduced: 25 Jun 2026
CVE-2026-33612 (opens in a new tab)How to fix?
Upgrade pdns-recursor to version 5.2.11, 5.3.8, 5.4.3 or higher.
Overview
Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity via the ZoneToCache function. An attacker can manipulate cached DNS records by sending a specially crafted zone from a malicious authoritative server, potentially causing incorrect DNS responses to be served to clients.