CVE-2026-0398

MEDIUM 5.3CVE-2026-0398 · Published 09/02/2026 · updated 17/06/2026

In short

CVE-2026-0398 is a MEDIUM (CVSS 5.3) vulnerability affecting recursor (powerdns).
Chance of exploitation in the next 30 days (EPSS): 0.34%, higher than 28.1% of all vulnerabilities.
Fix: update to 5.1.10, 5.2.8, 5.3.5 or later.

Package	Affected versions	Patched versions
recursor powerdns	`≥ 5.1.0, < 5.1.10≥ 5.2.8, < 5.2.8≥ 5.3.0, < 5.3.5`	`5.1.105.2.85.3.5`

Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Package

Affected versions

Patched versions

≥ 5.1.0, < 5.1.10≥ 5.2.8, < 5.2.8≥ 5.3.0, < 5.3.5

5.1.105.2.85.3.5

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