CVE-2026-21855 – Tarkov Data Manager has Unauthenticated Reflected XSS

CVE ID : CVE-2026-21855

Published : Jan. 7, 2026, 7:15 p.m. | 1 hour, 12 minutes ago

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.

Severity: 9.3 | CRITICAL

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