Vulnerability DatabaseCVE-2026-4893
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CVE-2026-4893
Published:May 11, 2026
Updated:May 16, 2026
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
Affected Packages
https://github.com/imp/dnsmasq.git (GITHUB):
Affected version(s) >=v2.0 <v2.92rel2
Fix Suggestion:
Update to version v2.92rel2
Related Resources (7)
https://www.kb.cert.org/vuls/id/471747
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
https://github.com/pi-hole/FTL/releases/tag/v6.6.2
https://thekelleys.org.uk/dnsmasq/
https://github.com/NixOS/nixpkgs/pull/519093
https://thekelleys.org.uk/dnsmasq/CVE/
https://github.com/NixOS/nixpkgs/pull/519082
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CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
EPSS
Base Score:
0.05