CVE-2026-25555 OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header
Unauthenticated attackers can gain admin access to OpenBullet2 by sending an empty X-Api-Key header, bypassing authentication checks.
- 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-2026-25555?
CVE-2026-25555 is a critical authentication bypass vulnerability in openbullet2, published on 8 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenBullet2 through version 0.3.2 contains an authentication bypass vulnerability in the API key authentication middleware that allows unauthenticated attackers to gain admin access by supplying an empty X-Api-Key header value. Attackers can exploit the middleware's comparison of the supplied header against an empty AdminApiKey default string to access the admin console and all API endpoints without valid credentials.
Weakness: CWE-305
Which versions are affected by CVE-2026-25555?
How do I fix CVE-2026-25555?
No fix has been published for CVE-2026-25555 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-2026-25555 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25555 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-54jj-4v6g-j34h.