CVE-2026-25555: Authentication Bypass by Primary Weakness in openbullet openbullet2
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.
AI Analysis
Technical Summary
CVE-2026-25555 describes a critical authentication bypass vulnerability in OpenBullet2 through version 0.3.2. The vulnerability arises because the API key authentication middleware compares the supplied X-Api-Key header against an empty default AdminApiKey string. If an attacker supplies an empty header value, the middleware incorrectly grants admin access. This allows unauthenticated attackers to access the admin console and all API endpoints, effectively bypassing authentication controls.
Potential Impact
An attacker can gain full administrative access to OpenBullet2 instances running affected versions without any valid credentials. This compromises the confidentiality, integrity, and availability of the system, as the attacker can control the admin console and API endpoints. The CVSS 4.0 base score is 9.3, indicating a critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided at this time. Until a patch is available, restrict access to the OpenBullet2 admin console and API endpoints to trusted networks and users only, and monitor for unauthorized access attempts.
CVE-2026-25555: Authentication Bypass by Primary Weakness in openbullet openbullet2
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.
CVSS v4.0
Score 9.3critical
Affected software
pkg:github/openbullet/openbullet2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-25555 describes a critical authentication bypass vulnerability in OpenBullet2 through version 0.3.2. The vulnerability arises because the API key authentication middleware compares the supplied X-Api-Key header against an empty default AdminApiKey string. If an attacker supplies an empty header value, the middleware incorrectly grants admin access. This allows unauthenticated attackers to access the admin console and all API endpoints, effectively bypassing authentication controls.
Potential Impact
An attacker can gain full administrative access to OpenBullet2 instances running affected versions without any valid credentials. This compromises the confidentiality, integrity, and availability of the system, as the attacker can control the admin console and API endpoints. The CVSS 4.0 base score is 9.3, indicating a critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided at this time. Until a patch is available, restrict access to the OpenBullet2 admin console and API endpoints to trusted networks and users only, and monitor for unauthorized access attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-02-02T20:12:33.395Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a26f65be29bf47b50429d7c
Added to database: 06/08/2026, 17:05:31 UTC
Last enriched: 07/15/2026, 11:05:38 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 67
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.