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CVE-2026-25555

OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header

Published: Jun 8, 2026Updated: Jun 8, 2026 Sources: CVE List NVD
NVD MITRE
9.8CVSS
CRITICAL

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-305

Affected Products

openbullet2
openbullet

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

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

Timeline

Published
Jun 8, 2026
Last Updated
Jun 8, 2026

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