CVE-2026-42389

MEDIUM

PowerDNS Recursor - Reject More Queries with Invalid Header Values

Title source: rule
STIX 2.1

Description

This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.

References (1)

Core 1

Scores

CVSS v3 5.3
EPSS 0.0018
EPSS Percentile 7.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (1)
PowerDNS/Recursor 5.4.0 - 5.4.3
Published Jun 25, 2026
Tracked Since Jun 25, 2026