Description
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.
Published: 2026-10-12
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

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History

Tue, 13 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 13 Oct 2026 04:45:00 +0000

Type Values Removed Values Added
First Time appeared Qgis
Qgis qgis
Vendors & Products Qgis
Qgis qgis

Mon, 12 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
Description 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.
Title QGIS: Stored XSS in WFS3 getFeatures HTML page via unescaped feature attribute values
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-13T14:55:49.324Z

Reserved: 2026-10-01T18:47:30.995Z

Link: CVE-2026-104140

cve-icon Vulnrichment

Updated: 2026-10-13T14:55:26.420Z

cve-icon NVD

Status : Received

Published: 2026-10-12T22:17:03.273

Modified: 2026-10-13T15:17:30.973

Link: CVE-2026-104140

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-13T04:30:17Z

Weaknesses