High severity8.8NVD Advisory· Published Jul 12, 2026· Updated Jul 14, 2026

CVE-2026-61876

Description

LuCI versions fail to properly encode DHCPv6 lease hostnames before rendering in status tables, allowing adjacent network attackers to inject HTML markup. Attackers can send a DHCPv6 Client FQDN containing script tags that execute in the administrator's browser when viewing DHCP lease pages.

Affected products

Openwrt/Lucillm-fuzzy

Patches

Vulnerability mechanics

References

github.com/openwrt/luci/security/advisories/GHSA-686p-p8p9-x6fhnvd
www.vulncheck.com/advisories/luci-dhcpv6-lease-hostname-stored-cross-site-scriptingnvd

News mentions

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cvss	0.572
epss	0.001
exploit	0.030
kev	0.000
patch	0.000
ransomware	0.000