Mega-Fence (webgate-lib.*) 25.1.914 and prior trusts the first value of the X-Forwarded-For (XFF) header as the client IP without validating a trusted proxy chain. An attacker can supply an arbitrary XFF value in a remote request to spoof the client IP, which is then propagated to security-relevant state (e.g., WG_CLIENT_IP cookie). Deployments that rely on this value for IP allowlists may be bypassed.
Advisories

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Fixes

Solution

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Workaround

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History

Tue, 06 Jan 2026 00:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 05 Jan 2026 21:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-807
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}


Mon, 05 Jan 2026 16:15:00 +0000

Type Values Removed Values Added
Description Mega-Fence (webgate-lib.*) 25.1.914 and prior trusts the first value of the X-Forwarded-For (XFF) header as the client IP without validating a trusted proxy chain. An attacker can supply an arbitrary XFF value in a remote request to spoof the client IP, which is then propagated to security-relevant state (e.g., WG_CLIENT_IP cookie). Deployments that rely on this value for IP allowlists may be bypassed.
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-01-05T21:08:06.488Z

Reserved: 2025-11-18T00:00:00.000Z

Link: CVE-2025-65328

cve-icon Vulnrichment

Updated: 2026-01-05T21:03:06.165Z

cve-icon NVD

Status : Received

Published: 2026-01-05T16:15:42.763

Modified: 2026-01-05T21:16:13.000

Link: CVE-2025-65328

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses