DEBIAN-CVE-2026-27953
ormar is a async mini ORM for Python. Versions 0.23.0 and below are vulnerable to Pydantic validation bypass through the model constructor, allowing any unauthenticated user to skip all field validation by injecting "__pk_only__": true into a JSON request body. By injecting "__pk_only__": true into a JSON request body, an unauthenticated attacker can skip all field validation and persist unvalidated data directly to the database. A secondary __excluded__ parameter injection uses the same pattern to selectively nullify arbitrary model fields (e.g., email or role) during construction. This affects ormar's canonical FastAPI integration pattern recommended in its official documentation, enabling privilege escalation, data integrity violations, and business logic bypass in any application using ormar.Model directly as a request body parameter. This issue has been fixed in version 0.23.1.
DEBIAN-CVE-2026-27953
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-2026-27953
ormar
Source reference: /affected/0/package/name
- Affected versions
- 0.12.0-3
Source reference:
/affected/0/versions0.12.2-1Source reference:
/affected/0/versions0.20.2-1Source reference:
/affected/0/versions0.21.0-1Source reference:
/affected/0/versions0.22.0-1Source reference:
/affected/0/versions0.23.0-1Source reference:
/affected/0/versions0.23.1-1Source reference:
/affected/0/versions0.24.0-1Source reference:
/affected/0/versions0.24.0-2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
ormar
Source reference: /affected/1/package/name
- Affected versions
- 0.11.2-1
Source reference:
/affected/1/versions0.11.2-2Source reference:
/affected/1/versions0.11.2-3Source reference:
/affected/1/versions0.11.3-1Source reference:
/affected/1/versions0.12.0-1Source reference:
/affected/1/versions0.12.0-2Source reference:
/affected/1/versions0.12.0-3Source reference:
/affected/1/versions0.12.2-1Source reference:
/affected/1/versions0.20.2-1Source reference:
/affected/1/versions0.21.0-1Source reference:
/affected/1/versions0.22.0-1Source reference:
/affected/1/versions0.23.0-1Source reference:
/affected/1/versions - Fixed versions
- 0.23.1-1
Source reference:
/affected/1/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": "ormar",
"purl": "pkg:deb/debian/ormar?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.12.0-3",
"0.12.2-1",
"0.20.2-1",
"0.21.0-1",
"0.22.0-1",
"0.23.0-1",
"0.23.1-1",
"0.24.0-1",
"0.24.0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27953.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.23.1-1"
}
]
}
],
"package": {
"name": "ormar",
"purl": "pkg:deb/debian/ormar?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.11.2-1",
"0.11.2-2",
"0.11.2-3",
"0.11.3-1",
"0.12.0-1",
"0.12.0-2",
"0.12.0-3",
"0.12.2-1",
"0.20.2-1",
"0.21.0-1",
"0.22.0-1",
"0.23.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27953.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57473 · Revision 1
- Added to Heist Feed
- Publisher date