Tarkov Data Manager Authentication Bypass vulnerability

published 2026-01-07 10 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-1399

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits: 0; none known

The Tarkov Data Manager is a tool to manage the Tarkov item data. Prior to 02 January 2025, an authentication bypass vulnerability in the login endpoint allows any unauthenticated user to gain full admin access to the Tarkov Data Manager admin panel by exploiting a JavaScript prototype property access vulnerability, combined with loose equality type coercion. A series of fix commits on 02 January 2025 fixed this and other vulnerabilities.

Patch / fix

fixed in 1 links 1

tarkov tarkov_data_manager 2025-01-02

github.com/the-hideout/tarkov-data-manager@f188f0a commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 10 mo ago (2026-01-07)

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

the-hideout tarkov-data-manager

Classification

Weakness

CWE-287 Improper Authentication
CWE-843 Access of Resource Using Incompatible Type
CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

Sources

CVE List CVE-2026-21854
NVD CVE-2026-21854

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary