DEBIAN-CVE-2026-44476
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 client_id, which is public information, can authenticate as that client at the token endpoint and obtain an access token without providing its client_secret. This occurs because the Dynamic Client Registration feature creates applications with confidential: false hard-coded, even though the registration response returns a client_secret and advertises support for the client_secret_basic and client_secret_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.
DEBIAN-CVE-2026-44476
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-44476
ruby-doorkeeper-openid-connect
Source reference: /affected/0/package/name
- Affected versions
- 1.10.1-1
Source reference:
/affected/0/versions1.10.5-1Source reference:
/affected/0/versions1.8.0-1Source reference:
/affected/0/versions1.8.11-1Source reference:
/affected/0/versions1.8.11-2Source reference:
/affected/0/versions1.8.5-1Source reference:
/affected/0/versions1.8.5-2Source reference:
/affected/0/versions1.8.7-1Source reference:
/affected/0/versions1.9.0-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
ruby-doorkeeper-openid-connect
Source reference: /affected/1/package/name
- Affected versions
- 1.10.1-1
Source reference:
/affected/1/versions1.10.5-1Source reference:
/affected/1/versions1.8.11-1Source reference:
/affected/1/versions1.8.11-2Source reference:
/affected/1/versions1.8.7-1Source reference:
/affected/1/versions1.9.0-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
ruby-doorkeeper-openid-connect
Source reference: /affected/2/package/name
- Affected versions
- 1.8.11-1
Source reference:
/affected/2/versions1.8.11-2Source reference:
/affected/2/versions1.8.7-1Source reference:
/affected/2/versions1.9.0-1Source reference:
/affected/2/versions - Fixed versions
- 1.10.1-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ruby-doorkeeper-openid-connect",
"purl": "pkg:deb/debian/ruby-doorkeeper-openid-connect?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.10.1-1",
"1.10.5-1",
"1.8.0-1",
"1.8.11-1",
"1.8.11-2",
"1.8.5-1",
"1.8.5-2",
"1.8.7-1",
"1.9.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44476.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ruby-doorkeeper-openid-connect",
"purl": "pkg:deb/debian/ruby-doorkeeper-openid-connect?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.10.1-1",
"1.10.5-1",
"1.8.11-1",
"1.8.11-2",
"1.8.7-1",
"1.9.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44476.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.1-1"
}
]
}
],
"package": {
"name": "ruby-doorkeeper-openid-connect",
"purl": "pkg:deb/debian/ruby-doorkeeper-openid-connect?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.8.11-1",
"1.8.11-2",
"1.8.7-1",
"1.9.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44476.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57024 · Revision 1
- Added to Heist Feed
- Publisher date