/Vulnerability Library

OpenBullet2 <= 0.3.2 - Authentication Bypass

CVE-2026-25555
Verified

Description

OpenBullet2 <= 0.3.2 contains an authentication bypass caused by improper API key authentication middleware handling empty X-Api-Key header, letting unauthenticated attackers gain admin access, exploit requires sending empty X-Api-Key header.

Severity

Critical

CVSS Score

9.8

Exploit Probability

3%

Affected Product

openbullet2

Published Date

June 16, 2026

Template Author

0x_akoko

CVE-2026-25555.yaml
9.8Score

CVSS Metrics

CVSS Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE ID:
cve-2026-25555
CWE ID:
cwe-287

References

https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2https://nvd.nist.gov/vuln/detail/CVE-2026-25555

Remediation Steps

Update to a version later than 0.3.2 or the latest available version.