CVE-2026-42255

MEDIUM 6.5CVE-2026-42255 · Published 26/04/2026 · updated 26/10/2026

In short

CVE-2026-42255 is a MEDIUM (CVSS 6.5) vulnerability affecting dnsserver (technitium).
Chance of exploitation in the next 30 days (EPSS): 0.21%, higher than 10.9% of all vulnerabilities.
Fix: update to 15.0 or later.

Package	Affected versions	Patched versions
dnsserver technitium	`< 15.0`	`15.0`

Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.

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