# CVE-2026-25555

## Summary

- **CVE ID:** CVE-2026-25555
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (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)
- **CWE:** CWE-305
- **Published:** Jun 8, 2026
- **Last Modified:** Jul 14, 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.

## Affected Products

- openbullet — openbullet2 (0)

## References

- [CNA](https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2)
- [CNA](https://www.vulncheck.com/advisories/openbullet2-authentication-bypass-via-x-api-key-header)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.82%
- **EPSS Percentile:** 77.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._