CVE-2026-21855

CRITICAL
2026-01-07 [email protected]
9.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Feb 03, 2026 - 16:20 vuln.today
Public exploit code
CVE Published
Jan 07, 2026 - 19:15 nvd
CRITICAL 9.3

Tags

XSS Tarkov Data Manager

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.

Analysis

Tarkov Data Manager has reflected XSS in the toast notification system. Attackers can craft URLs that execute arbitrary JavaScript in the victim's browser, stealing session tokens. …

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Remediation

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Verify anti-CSRF tokens and content security policies are enforced.

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Priority Score

67
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +46
POC: +20

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CVE-2026-21855 vulnerability details – vuln.today
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