CVE-2026-42387

Insufficient input validation in ZoneToCache

Medium · published June 25, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
40.7
In the wild
Unconfirmed
What it is

A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00483 · 40.7th percentile
Published
2026-06-25T12:59Z
EPSS history
Timeline
  • 25 JUN 12:59Z
    Insufficient input validation in ZoneToCache
    cvelistv5