CVE-2026-25555
OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header
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.
INFO
Published Date :
June 8, 2026, 5:16 p.m.
Last Modified :
July 23, 2026, 7:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-25555
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update OpenBullet2 to a version later than 0.3.2.
- Ensure API key authentication middleware is correctly configured.
- Remove or secure default AdminApiKey values.
Public PoC/Exploit Available at Github
CVE-2026-25555 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-25555.
| URL | Resource |
|---|---|
| https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2 | |
| https://www.vulncheck.com/advisories/openbullet2-authentication-bypass-via-x-api-key-header |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-25555 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-25555
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python Go
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.
codeb0ss cve-2026 openbullet2 realcodeb0ss thecodeb0ss cve-2026-25555 cve-2026-25555-poc
每日CVE漏洞汇总
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-25555 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-25555 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: OpenBullet2 de openbullet, Description: OpenBullet2 hasta la versión 0.3.2 contiene una vulnerabilidad de omisión de autenticación en el middleware de autenticación de clave API que permite a atacantes no autenticados obtener acceso de administrador al proporcionar un valor de encabezado X-Api-Key vacío. Los atacantes pueden explotar la comparación del middleware del encabezado proporcionado con una cadena predeterminada AdminApiKey vacía para acceder a la consola de administración y a todos los puntos finales de la API sin credenciales válidas. -
CVE Modified by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/openbullet/openbullet2', 'vendor': 'openbullet', 'product': 'openbullet2', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '0.3.2'}], 'defaultStatus': 'affected'}] [{'repo': 'https://github.com/openbullet/openbullet2', 'vendor': 'openbullet', 'product': 'openbullet2', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '0.3.2'}], 'packageURL': 'pkg:github/openbullet/openbullet2', 'defaultStatus': 'affected'}] -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/openbullet/openbullet2', 'vendor': 'openbullet', 'product': 'openbullet2', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '0.3.2'}], 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-25555', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-08T17:48:55.557211Z'} -
New CVE Received by [email protected]
Jun. 08, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-305 Added Reference https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2 Added Reference https://www.vulncheck.com/advisories/openbullet2-authentication-bypass-via-x-api-key-header