Vulnerability · Published Jan 7, 2026 · Assigned by GitHub_M

CVE-2026-21854Tarkov Data Manager Authentication Bypass vulnerability

Critical 9.8

In plain English

A critical-severity improper authentication in tarkov-data-manager from the-hideout. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.5%top 59.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
the-hideout	tarkov-data-manager	<= 2.0.0

Weakness: CWE-287, CWE-843, CWE-1321 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/the-hideout/tarkov-data-manager/security/advisories/GHSA-r8w6-9xwg-6h73 x_refsource_CONFIRM
https://github.com/the-hideout/tarkov-data-manager/commit/f188f0abf766cefe3f1b7b4fc6fe9dad3736174a x_refsource_MISC