Moole Vulnerability Database

Find real vulnerabilities before they ship

Medium

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.

VectorNETWORK

PublishedMay 11, 2026, 18:16

Published Bycret@cert.org

Base Score

Score5.3

Affected Versions

No affected versions found.

References

https://github.com/NixOS/nixpkgs/pull/519082
https://github.com/NixOS/nixpkgs/pull/519093
https://github.com/pi-hole/FTL/releases/tag/v6.6.2
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
https://thekelleys.org.uk/dnsmasq/CVE/
https://www.kb.cert.org/vuls/id/471747

CVSS Metrics

Base Score

5.3

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Base SeverityMedium

Version

3.1

Attack Vector (AV)

NETWORK