CVE-2026-48996: Trilium: Malicious import with GeoMap marker title XSS leads to RCE on the desktop client

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-08-27 · updated 2026-10-14
Weakness: CWE-79

Description

Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on "Safe import" filter does not sanitize note titles, and the GeoMap note view interpolates a marker note's title into raw HTML that is rendered as innerHTML, allowing an attacker-supplied import archive to inject script that runs when the map is displayed. Because Safe import neutralizes scripts but never escapes titles, a note whose title contains an HTML event-handler payload survives the import and executes as soon as the victim opens the GeoMap that renders its marker. On the desktop client the Electron renderer runs with Node integration enabled, so the injected JavaScript escalates from cross-site scripting to full remote code execution on the victim's machine. This issue is fixed in version 0.104.0.

Affected products

TriliumNext Trilium: before 0.104.0 — fixed in 0.104.0

How to fix

Upgrade to a fixed version: TriliumNext Trilium 0.104.0. Check the vendor advisory for mitigations.

References

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