CVE-2026-25555
CRITICALOpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Exploit technical-description
exploit
https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/openbullet2-authentication-bypass-via-x-api-key-header
Scores
CVSS v3
9.8
EPSS
0.0070
EPSS Percentile
48.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-305
Status
published
Products (1)
openbullet/openbullet2
< 0.3.2
Published
Jun 08, 2026
Tracked Since
Jun 08, 2026