CVE-2026-21854CWE-1321CWE-287CWE-843

Tarkov Data Manager Authentication Bypass vulnerability

Critical · published January 7, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
39.1
In the wild
Unconfirmed
What it is

🚨 An authentication bypass flaw in the Tarkov Data Manager lets anyone walk right into the admin panel – no credentials needed! 🔥 Think of it like a restaurant where anyone can stroll behind the counter and start cooking without any training – the potential for chaos is off the charts! An attacker could gain full admin access, allowing them to manipulate item data, delete crucial information, or even disrupt services entirely. This is absolutely devastating for the integrity of the Tarkov ecosystem and could lead to widespread chaos among users.

Put simply

Think of it like a restaurant where anyone can stroll behind the counter and start cooking without any training – the potential for chaos is off the charts! This vulnerability stems from a JavaScript prototype property access error combined with loose equality type coercion, allowing anyone to bypass authentication checks at the login endpoint before the fix was applied on 02 January 2025.

What to do

An attacker could gain full admin access, allowing them to manipulate item data, delete crucial information, or even disrupt services entirely. This is absolutely devastating for the integrity of the Tarkov ecosystem and could lead to widespread chaos among users. Immediately update to the latest version of Tarkov Data Manager as of January 2025 to close this loophole. Ensure that authentication checks are properly enforced and consider conducting a security review of your authentication flow to prevent future issues. You've got this! With a quick update, you can lock this down and keep your data safe! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00462 · 39.1th percentile
Weaknesses
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'); CWE-287 · Improper Authentication; CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')
Published
2026-01-07T18:14Z
EPSS history
Timeline
  • 07 JAN 18:14Z
    Tarkov Data Manager Authentication Bypass vulnerability
    cvelistv5