CVE-2026-21855: Tarkov Data Manager has Unauthenticated Reflected XSS
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 Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-21855?
CVE-2026-21855 is classified as a reflected Cross Site Scripting (XSS) vulnerability.
How do I fix CVE-2026-21855?
To mitigate CVE-2026-21855, upgrade the Tarkov Data Manager to a version released after January 2, 2025.
What versions of Tarkov Data Manager are affected by CVE-2026-21855?
CVE-2026-21855 affects versions of Tarkov Data Manager prior to January 2, 2025.
What exploits are possible with CVE-2026-21855?
CVE-2026-21855 allows attackers to execute arbitrary JavaScript in the context of a victim's browser session.
Is there a patch available for CVE-2026-21855?
A patch for CVE-2026-21855 will be included in the release of Tarkov Data Manager after January 2, 2025.