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CVE-2026-61876

LuCI DHCPv6 Lease Hostname Stored Cross-Site Scripting

HIGH
8.8
CVSS Score
Published: July 12, 2026 at 12:07 PM UTC
Updated: October 24, 2026 at 10:10 PM UTC
1 product affected across 1 vendorLuci

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Severity
HIGH8.8
Exploit prediction
EPSS 2%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Luci· Openwrt
90%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://github.com/openwrt/luci/security/advisories/GHSA-686p-p8p9-x6fh
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/luci-dhcpv6-lease-hostname-stored-cross-site-scripting

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHVulnCheck
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-79

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