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Vulnerabilities CVE-2026-61477

CVE-2026-61477

Low
Open
TLP:CLEAR

Libvirt: libvirt: newline injection in network xml dns txt/srv fields allows dnsmasq config directive injection

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Description

An injection vulnerability was found in libvirt's virtual network driver. The network XML parser does not strip newline characters from DNS TXT record value attributes and SRV record domain/target attributes. These values are written verbatim into the dnsmasq configuration file generated by the network driver, allowing a user with permission to define virtual networks to inject arbitrary dnsmasq configuration directives such as dhcp-script, leading to arbitrary command execution as root.

Details

CVSS Score
2.3
EPSS Score
0.24%

15.1th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Confidence
90%
Published
Aug 7, 2026
Last Modified
Aug 7, 2026
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