CVE-2026-61876

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

ProductOpenwrt Luci

PublishedJul 12, 2026

First seenJul 12, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Vendor advisories

github.com/openwrt/luci/security/advisories/GHSA-686p-p8p9-x6fh

Affected products

Product	Affected versions	Fixed in
openwrt luci	No range specified	—

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