CVE-2026-21855
Critical
Description
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.
SeverityCritical
CVSS9.3
Exploit probability—
ProductTarkov Data Manager
PublishedJan 7, 2026
First seenJan 7, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- tarkov tarkov_data_manager2025-01-02 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| tarkov tarkov_data_manager | v < 2025-01-02 | 2025-01-02 |
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