What is CVE-2026-4890?

CVE-2026-4890 is a high-severity vulnerability in Dnsmasq, classified under CWE-835: LOOP WITH UNREACHABLE TERMINATION. CVSS score: 7.5/10. Published 2026-05-11.

How severe is CVE-2026-4890?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Dnsmasq

CVE-2026-4890

A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.

EPSS: 0.002 (47.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Dnsmasq — versions 0, 2.93, 2.92rel2

References

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Frequently asked questions

What is CVE-2026-4890?: CVE-2026-4890 is a high-severity vulnerability in Dnsmasq, classified under CWE-835: LOOP WITH UNREACHABLE TERMINATION. CVSS score: 7.5/10. Published 2026-05-11.
How severe is CVE-2026-4890?: High severity. CVSS v3 base score is 7.5 out of 10.