QGIS: Stored XSS in WFS3 getFeatures HTML page via unescaped feature attribute values

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-104140
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-12 22:17:03 UTC
Updated2026-10-13 15:17:30 UTC
DescriptionQGIS 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.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Qgis QGIS affected < 3.44.12 Not specified
CNA Qgis QGIS affected >= 4.0.0, <= 4.2.3 Not specified

References

ReferenceSourceLinkTags
github.com/qgis/QGIS/pull/67044 [email protected] github.com
github.com/qgis/QGIS/security/advisories/GHSA-cr49-pm9v-m788 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/qgis/QGIS/releases/tag/final-3_44_12 [email protected] github.com
github.com/qgis/QGIS/pull/66616 [email protected] github.com
github.com/qgis/QGIS/commit/1930e81c918818a4f5412219f8f7e470d2709f91 [email protected] github.com
github.com/qgis/QGIS/commit/ca76fcac616dbf1c0446514fd6517296eb7c6904 [email protected] github.com
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