CVE-2026-62948
OpenWrt odhcpd/LuCI: unauthenticated DHCPv6 client can inject lease-file lines via FQDN hostname → stored XSS in the LuCI admin UI
CVSS Score
9.6
EPSS Score
0.0%
EPSS Percentile
0th
OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, odhcpd writes a DHCPv6 client FQDN option 39 hostname into /tmp/odhcpd.leases through src/statefiles.c statefiles_write_state6() and statefiles_write_state4() without escaping, allowing newline injection of forged lease lines that LuCI rpcd-mod-luci getDHCPLeases displays through htdocs/luci-static/resources/view/status/include/40_dhcp.js and htdocs/luci-static/resources/luci.js dom.append as live HTML in the Active DHCPv6 Leases admin page. This vulnerability is fixed in 25.12.5.
| CWE | CWE-79 CWE-117 CWE-150 |
| Vendor | openwrt |
| Product | openwrt |
| Published | Jul 15, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
openwrt / openwrt
< 25.12.5
References
github.com: https://github.com/openwrt/openwrt/security/advisories/GHSA-hhmc-92hw-535f github.com: https://github.com/openwrt/odhcpd/pull/404 github.com: https://github.com/openwrt/luci/commit/55379d04fcc3c605003a5001d6135cf02ae6048a github.com: https://github.com/openwrt/odhcpd/commit/68f382690bfaec56d5b1f31c3c31c48bcb642e3a github.com: https://github.com/openwrt/openwrt/releases/tag/v25.12.5