CVE-2026-4893

CVE-2026-4893 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

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

Frequently asked questions

What is 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.
How severe is CVE-2026-4893?
CVE-2026-4893 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-4893 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4893?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4893 have an EU (EUVD) identifier?
Yes. CVE-2026-4893 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29155.
When was CVE-2026-4893 published?
CVE-2026-4893 was published on 2026-05-11 and last updated on 2026-06-17.

References