CVE-2026-21855: Tarkov Data Manager

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

The Tarkov Data Manager is a tool to manage the Tarkov item data. Prior to 02 January 2025, a reflected Cross Site Scripting (XSS) vulnerability in the toast notification system allows any attacker to execute arbitrary JavaScript in the context of a victim's browser session by crafting a malicious URL. A series of fix commits on 02 January 2025 fixed this and other vulnerabilities.

Affected products

• Tarkov Tarkov Data Manager: before 2025-01-02 (fixed in 2025-01-02)

Published 2026-01-07. Last modified 2026-06-17.