CVE-2026-21854 Tarkov Data Manager Authentication Bypass vulnerability
Unauthenticated attackers can gain full admin access to the Tarkov Data Manager panel via a prototype pollution and type coercion flaw in the login endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21854?
CVE-2026-21854 is a critical authentication bypass vulnerability in the-hideout tarkov-data-manager, published on 7 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-21854?
It affects 1 product.
Products include Tarkov Tarkov Data Manager.
How do I fix CVE-2026-21854?
No fix has been published for CVE-2026-21854 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-21854 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-21854 exists.
Other vulnerabilities in the-hideout tarkov-data-manager
Sources
Also known as GHSA-r8w6-9xwg-6h73.