CVE-2026-44476

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-44476
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44476.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44476
Aliases
Downstream
Published
2026-08-25T22:47:54.774Z
Modified
2026-08-28T11:30:38.959542488Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Doorkeeper OpenID Connect: Dynamic Client Registration feature creates public clients with client_secret
Details

Doorkeeper is an OAuth 2 provider for Ruby on Rails. In version 1.9.0, an attacker who knows only a dynamically registered client's clientid, which is public information, can authenticate as that client at the token endpoint and obtain an access token without providing its clientsecret. This occurs because the Dynamic Client Registration feature creates applications with confidential: false hard-coded, even though the registration response returns a clientsecret and advertises support for the clientsecretbasic and clientsecret_post authentication methods; since Doorkeeper treats a blank or missing secret as valid for non-confidential (public) clients, the secret is never verified. Only projects that have explicitly enabled Dynamic Client Registration, which is disabled by default, are affected. This issue is fixed in version 1.10.0.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44476.json",
    "cwe_ids": [
        "CWE-1390",
        "CWE-287"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/doorkeeper-gem/doorkeeper-openid_connect

Affected ranges

Type
GIT
Repo
https://github.com/doorkeeper-gem/doorkeeper-openid_connect
Events
Introduced
ea1e8228c853555e483aca22ec26f2c47416dc98
Fixed
561af83dcf
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "1.9.0"
        },
        {
            "fixed": "1.10.0"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44476.json"