Doorkeeper Improper Authentication vulnerability
Priority MEDIUM 64CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-287.
Summary
Doorkeeper is an OAuth 2 provider for Ruby on Rails / Grape. Prior to version 5.6.6, Doorkeeper automatically processes authorization requests without user consent for public clients that have been previous approved. Public clients are inherently vulnerable to impersonation, their identity cannot be assured. This issue is fixed in version 5.6.6.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00716 54th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed doorkeeper (doorkeeper-gem): 5.6.6doorkeeper (RubyGems): 5.6.6
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| doorkeeper-gem | doorkeeper | before 5.6.6 | 5.6.6 | Patch available | CNA |
| — | doorkeeper (RubyGems) | before 5.6.6 | 5.6.6 | Patch available | GHSA-7w2c-w47h-789w |
- doorkeeper Vendordoorkeeper-gem Affected before 5.6.6 Fixed in 5.6.6 Patch available CNA
- doorkeeper (RubyGems) Vendor— Affected before 5.6.6 Fixed in 5.6.6 Patch available GHSA-7w2c-w47h-789w
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:doorkeeper_project:doorkeeper:*:*:*:*:*:ruby:*:* | before 5.6.6 | Vulnerable | Doorkeeper Project |
- cpe:2.3:a:doorkeeper_project:doorkeeper:*:*:*:*:*:ruby:*:* Versions before 5.6.6 Vulnerable ·Doorkeeper Project
Remediation
- Fix · CNA doorkeeper (doorkeeper-gem) Fixed in 5.6.6
- Fix · GHSA-7w2c-w47h-789w doorkeeper (RubyGems) Fixed in 5.6.6 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-34246
- 2026-10-03 Alias added: GHSA-7w2c-w47h-789w
References
Advisory 2
Other 6
- https://github.com/doorkeeper-gem/doorkeeper/releases/tag/v5.6.6
- https://www.rfc-editor.org/rfc/rfc8252#section-8.6
- https://lists.debian.org/debian-lts-announce/2023/07/msg00016.html
- https://github.com/doorkeeper-gem/doorkeeper
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/doorkeeper/CVE-2023-34246.yml
- https://lists.debian.org/debian-lts-announce/2024/12/msg00010.html
More doorkeeper-gem vulnerabilities
- TI-2026-32415 Doorkeeper OpenID Connect: Dynamic Client Registration feature creates public clients with client_secret CVSS 4.0MEDIUM 6.3
- TI-2026-49360 Doorkeeper OpenID Connect: DCR endpoint persists unvalidated client-supplied scopes CVSS 3.1MEDIUM 4.2
Sources
- CVE-2023-34246 · CVE Program
- CVE-2023-34246 · NVD
- FIRST EPSS
- GHSA-7w2c-w47h-789w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences