CVE-2026-54355: Improper Neutralization of Input During Web Page Generation

MapServer is a system for developing web-based GIS applications. From 6.0 until 8.6.4, MapServer's OpenLayers HTML output for SERVICE=WMS&REQUEST=GetMap&FORMAT=application/openlayers reflects an attacker-controlled X-Forwarded-Host value received as HTTPXFORWARDEDHOST through msBuildOnlineResourc...