CVE-2026-62948

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.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.8 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/openwrt/luci/commit/55379d04fcc3c605003a5001d6135cf02ae6048a	Patch
https://github.com/openwrt/odhcpd/commit/68f382690bfaec56d5b1f31c3c31c48bcb642e3a	Patch
https://github.com/openwrt/odhcpd/pull/404	Issue Tracking Patch
https://github.com/openwrt/openwrt/releases/tag/v25.12.5	Release Notes
https://github.com/openwrt/openwrt/security/advisories/GHSA-hhmc-92hw-535f	Exploit Mitigation Vendor Advisory
https://github.com/openwrt/openwrt/security/advisories/GHSA-hhmc-92hw-535f	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-15 18:16

Updated : 2026-07-21 16:06

NVD link : CVE-2026-62948

Mitre link : CVE-2026-62948

CVE.ORG link : CVE-2026-62948

JSON object : View

Products Affected

openwrt

openwrt

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-117

Improper Output Neutralization for Logs

CWE-150

Improper Neutralization of Escape, Meta, or Control Sequences

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