CVE-2026-25856 OpenBullet2 0.3.2 Authenticated RCE via Job Configuration Interface
Authenticated attackers can execute arbitrary C# code on the server via job configurations, leading to full system compromise.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-25856?
CVE-2026-25856 is a high-severity code injection vulnerability in openbullet2, published on 8 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
OpenBullet2 through version 0.3.2 contains an authenticated remote code execution vulnerability that allows authenticated users to execute arbitrary C# code on the server host by creating or modifying job configurations. Attackers can leverage the plain C# execution mode, which lacks reference filtering or API restrictions, to access the file system, spawn processes, and invoke arbitrary .NET APIs as the process user.
Weakness: CWE-94
Which versions are affected by CVE-2026-25856?
How do I fix CVE-2026-25856?
No fix has been published for CVE-2026-25856 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-25856 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25856 exists.
Sources
Also known as GHSA-w8vj-qcv3-4w36.