Vulnerability Report

CVE-2026-0398

Title: Cache poisoning in PowerDNS Recursor via crafted zones/CNAME chains

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2026-0398.

CWE Category NVD-CWE-noinfo

Published Date Feb 09, 2026

Modified Date Apr 20, 2026

Exploit Status Not Found

Score 5.3 CVSS v3.1

Exploit Probability (EPSS)

0.30%

Vulnerability Summary

CVE-2026-0398: Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.

Impacted Vendors

powerdns 1

Reference Links

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

5.3

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-0398 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

April 20, 2026 MODIFIED

Vulnerability data updated via NVD.

April 20, 2026 MODIFIED

Vulnerability data updated via NVD.

February 09, 2026 MODIFIED

Vulnerability data updated via NVD.

February 09, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Stack

No specific products linked.