CVE-2026-21855

CRITICAL

Tarkov Data Manager < 2025-01-02 - Reflected Cross-Site Scripting via Toast Notification System

Title source: llm

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.

References (1)

Core 1

Core References

Exploit, Vendor Advisory x_refsource_confirm

https://github.com/the-hideout/tarkov-data-manager/security/advisories/GHSA-9c23-rrg9-jc89

Scores

CVSS v3 9.3

EPSS 0.0020

EPSS Percentile 10.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (1)

tarkov/tarkov_data_manager < 2025-01-02

Published Jan 07, 2026

Tracked Since Feb 18, 2026