QGIS up to 3.44.11/4.2.3 OGC API Features Rendering getFeatures.html htmlDump feature.properties cross site scripting

Summaryinfo

A vulnerability categorized as problematic has been discovered in QGIS up to 3.44.11/4.2.3. The impacted element is the function QgsServerOgcApiHandler::htmlDump of the file resources/server/api/ogc/templates/wfs3/getFeatures.html of the component OGC API Features Rendering. Executing a manipulation of the argument feature.properties can lead to cross site scripting. This vulnerability is tracked as CVE-2026-104140. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in QGIS up to 3.44.11/4.2.3. It has been declared as problematic. This vulnerability affects the function QgsServerOgcApiHandler::htmlDump of the file resources/server/api/ogc/templates/wfs3/getFeatures.html of the component OGC API Features Rendering. The manipulation of the argument feature.properties with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

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's session data or issue authenticated requests with the viewer's privileges. This issue is fixed in version 3.44.12.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-104140 since 10/01/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

By approaching the search of inurl:resources/server/api/ogc/templates/wfs3/getFeatures.html it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 3.44.12 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• QGIS

Version

• 3.44.0
• 3.44.1
• 3.44.2
• 3.44.3
• 3.44.4
• 3.44.5
• 3.44.6
• 3.44.7
• 3.44.8
• 3.44.9
• 3.44.10
• 3.44.11
• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3

Website

• Product: https://github.com/qgis/QGIS/

CPE 2.3info

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Once again VulDB remains the best source for vulnerability data.

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