CVE-2026-104140 (GCVE-0-2026-104140)

Vulnerability from cvelistv5 – Published: 2026-10-12 21:53 – Updated: 2026-10-13 14:55
VLAI
Title
QGIS: Stored XSS in WFS3 getFeatures HTML page via unescaped feature attribute values
Summary
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.
Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 14:55 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7856 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
qgis QGIS Affected: < 3.44.12
Affected: >= 4.0.0, <= 4.2.3
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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