Network Traffic Vulnerability in PowerDNS Recursor by OpenSource
CVE-2026-24027

5.3MEDIUM

Key Information:

Vendor

Powerdns

Status
Recursor
Vendor
CVE Published:
9 February 2026

What is CVE-2026-24027?

A vulnerability exists in PowerDNS Recursor whereby crafted zones can cause a surge in incoming network traffic. This situation may lead to resource exhaustion, affecting the performance and availability of the service. Administrators are advised to review configurations and apply necessary mitigations to prevent potential exploitation.

Affected Version(s)

Recursor 5.3.0 < 5.3.5

Recursor 5.2.0 < 5.2.8

Recursor 5.1.0 < 5.1.10

References

https://docs.powerdns.com/recursor/security-advisories/po...

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Shuhan Zhang from Tsinghua University
.