CVE-2026-25555
OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header
- State
- Published
- Severity
- 9.3 Critical
- Published
- Jun 8, 2026
- Updated
- Jul 14, 2026
- Reserved
- Feb 2, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-305 Authentication Bypass by Primary Weakness
Affected Products
| Product | Versions |
|---|---|
openbullet2openbullet |
|
References
- https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2technical-descriptionexploit
- https://www.vulncheck.com/advisories/openbullet2-authentication-bypass-via-x-api-key-headerthird-party-advisory
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