CVE-2026-25555CWE-305

OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header

Critical · published June 8, 2026

CVSS v4.0
9.3
EPSS
3%
Percentile
86.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
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
EPSS
0.02732 · 86.0th percentile
Weakness
CWE-305 · Authentication Bypass by Primary Weakness
Published
2026-06-08T16:53Z
EPSS history
Timeline
  • 08 JUN 16:53Z
    OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header
    cvelistv5