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    <lastBuildDate>Mon, 09 Nov 2026 18:10:13 +0000</lastBuildDate>
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      <title>CVE-2026-104140 — QGIS: Stored XSS in WFS3 getFeatures HTML page via unescaped feature attribute values</title>
      <link>https://db.gcve.eu/vuln/cve-2026-104140</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; QGIS&lt;/p&gt;
&lt;p&gt;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 reach resources/server/api/ogc/templates/wfs3/getFeatures.html through QgsServerOgcApiHandler::htmlDump and the if_nullptr_null_str callback. A user who opens an items HTML page can execute stored markup or script in the QGIS Server origin, which can expose the viewer&amp;#39;s session data or issue authenticated requests with the viewer&amp;#39;s privileges. This issue is fixed in version 3.44.12.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; QGIS&lt;/p&gt;
&lt;p&gt;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 reach resources/server/api/ogc/templates/wfs3/getFeatures.html through QgsServerOgcApiHandler::htmlDump and the if_nullptr_null_str callback. A user who opens an items HTML page can execute stored markup or script in the QGIS Server origin, which can expose the viewer&amp;#39;s session data or issue authenticated requests with the viewer&amp;#39;s privileges. This issue is fixed in version 3.44.12.&lt;/p&gt;</content:encoded>
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