Bug 2550006 (CVE-2026-104140) - CVE-2026-104140 qgis: QGIS: Cross-site scripting via unescaped feature properties in WFS HTML responses
Summary: CVE-2026-104140 qgis: QGIS: Cross-site scripting via unescaped feature proper...
Keywords:
Status: NEW
Alias: CVE-2026-104140
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2550236
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-12 22:01 UTC by OSIDB Bzimport
Modified: 2026-10-13 07:34 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-10-12 22:01:27 UTC 
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.
Note You need to log in before you can comment on or make changes to this bug.