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VULNERABILITIES

CVE-2026-4893 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/NixOS/nixpkgs/pull/519082 [email protected]
https://github.com/NixOS/nixpkgs/pull/519093 [email protected]
https://github.com/pi-hole/FTL/releases/tag/v6.6.2 [email protected]
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html [email protected]
https://thekelleys.org.uk/dnsmasq/CVE/ [email protected]

see all 6 references

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-4893
NVD Published Date:
May 11, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-4893 Details - Not Deferred