CVE-2023-34246: Doorkeeper is an OAuth 2 provider for Ruby on Rails / Grape

Q: How do I fix CVE-2023-34246?

doorkeeper: upgrade to 5.6.6. Exact commands for each OS are on this page.

Q: Is CVE-2023-34246 being exploited?

CVE-2023-34246 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-34246 affect?

CVE-2023-34246 affects doorkeeper. Severity is medium (CVSS 4.2). 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 inhe

Q: How urgent is CVE-2023-34246?

Priority 33/100. Public exploit reference

Routine

MEDIUM 4.2UPGRADE

CVE-2023-34246 is a medium-severity flaw (CVSS 4.2) affecting doorkeeper. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.2 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-287
Published	2023-06-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: doorkeeper project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-06-12 17:15 UTCPublished CVE record published
2026-06-17 06:03 UTCUpdated Record last modified

doorkeeper project doorkeeper UPGRADE

Affected: < 5.6.6

Fixed in: 5.6.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy doorkeeper || rpm -q doorkeeper || doorkeeper --version

2. UPGRADE to 5.6.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade doorkeeper

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade doorkeeper

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-34246?

doorkeeper: upgrade to 5.6.6. Exact commands for each OS are on this page.

Is CVE-2023-34246 being exploited?

CVE-2023-34246 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-34246 affect?

CVE-2023-34246 affects doorkeeper. Severity is medium (CVSS 4.2). 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 inhe

How urgent is CVE-2023-34246?

Priority 33/100. Public exploit reference

Software pages

Ruby on Rails vulnerabilities · Ruby vulnerabilities

References

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