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dnssec news

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CVE-2026-4890high

Dnsmasq DNSSEC Vulnerability Leads to Denial-of-Service

A critical denial-of-service vulnerability, identified as CVE-2026-4890, has been disclosed in Dnsmasq, a widely used DNS forwarder and DHCP server. The flaw, which received a CVSS score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), allows remote attackers to trigger an infinite loop by sending specially crafted DNSSEC NSEC/NSEC3 records, leading to a denial-of-service condition.