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

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-05 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

Traccar: from 6.11.1 before 6.13.0 — fixed in 6.13.0

How to fix

Upgrade to a fixed version: Traccar 6.13.0. Check the vendor advisory for mitigations.

References

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