CVE-2026-4893
5.3
MEDIUM
CVSS 3.1
EPSS 0.03%
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.
How to fix CVE-2026-4893
To remediate CVE-2026-4893, upgrade the affected package to a fixed version below.
- Alpine/dnsmasq—upgrade to 2.91-r1 or later
- Debian/dnsmasq—no fix listed
Is CVE-2026-4893 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.91-r1
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |