CVE-2026-61477: Libvirt: libvirt: newline injection in network xml dns txt/srv fields allows dnsmasq config directive injection

lowCVSS 2.3CVE-2026-61477

CSIRTS triage

vendor: Libvirt product: libvirt Code injection

What: Newline injection in network XML DNS TXT/SRV fields allows dnsmasq configuration directive injection.
Who is affected: Deployments using libvirt with DNS configuration via XML that processes dnsmasq directives.
Urgency: Low severity (CVSS 2.3); requires local access and network configuration privileges to exploit.
Action: Apply libvirt patch addressing CVE-2026-61477 or update to a patched version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: low — CVSS 2.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-61477

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-614770.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-61477	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

lowCVE-2026-61477: An injection vulnerability was found in libvirt's virtual network driver. The network XML pars…nvd

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