Vulnerability DatabaseCVE-2026-25555
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CVE-2026-25555
Published:June 08, 2026
Updated:August 06, 2026
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.
Related Resources (5)
https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2
https://github.com/openbullet/openbullet2
https://www.vulncheck.com/advisories/openbullet2-authentication-bypass-via-x-api-key-header
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25555.json
https://nvd.nist.gov/vuln/detail/CVE-2026-25555
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Authentication Bypass by Primary Weakness
CWE-305
EPSS
Base Score:
1.82