What is CVE-2026-4893?

CVE-2026-4893 is a medium-severity vulnerability in Dnsmasq, classified under CWE-287: IMPROPER AUTHENTICATION. CVSS score: 5.3/10. Published 2026-05-11.

How severe is CVE-2026-4893?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2026-4893 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Dnsmasq

CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.

EPSS: 0.000 (8.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Dnsmasq — versions 0, 2.93, 2.92rel2

Public proof-of-concept exploits

lottiedeyan/CVE20264893poc

References

cret@cert.org
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Frequently asked questions

What is CVE-2026-4893?: CVE-2026-4893 is a medium-severity vulnerability in Dnsmasq, classified under CWE-287: IMPROPER AUTHENTICATION. CVSS score: 5.3/10. Published 2026-05-11.
How severe is CVE-2026-4893?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2026-4893 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.