CVE-2026-104140

QGIS is a free, open source, cross-platform geographic information system. Prior to 3.44.12 and 4.0.0 through 4.2.3, QGIS Server renders feature data in WFS3 OGC API Features HTML responses without HTML escaping. Attacker-controlled feature.properties values from a published writable vector layer...

CVE-2026-104140

QGIS Server is vulnerable to a Stored Cross-Site Scripting (XSS) flaw in the WFS3 (OGC API Features) HTML responses. The root cause is the lack of HTML escaping for feature attribute values processed via QgsServerOgcApiHandler::htmlDump and the if_nullptr_null_str callback. An attacker can inject...

CVE-2026-104140 QGIS: Stored XSS in WFS3 getFeatures HTML page via unescaped feature attribute values

QGIS is a free, open source, cross-platform geographic information system. Prior to 3.44.12 and 4.0.0 through 4.2.3, QGIS Server renders feature data in WFS3 OGC API Features HTML responses without HTML escaping. Attacker-controlled feature.properties values from a published writable vector layer...