CVE-2026-61876
LuCI DHCPv6 Lease Hostname Stored Cross-Site Scripting
- State
- Published
- Severity
- 9.4 Critical
- Published
- Jul 12, 2026
- Updated
- Jul 14, 2026
- Reserved
- Jul 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.4 Critical | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
luciopenwrt |
References
- GitHub Security Advisory (GHSA-686p-p8p9-x6fh)vendor-advisory
- VulnCheck Advisory: LuCI DHCPv6 Lease Hostname Stored Cross-Site Scriptingthird-party-advisory
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