CVE-2026-27953
CVE-2026-27953 · ormar has a Pydantic Validation Bypass via Kwargs Injection in Model Constructor
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
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.
CVSS 7.1 · Alta · EPSS 1,2% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: system · python
Productos y versiones afectados
ormar
- Versiones
- < 0.23.1: Afectada
Sin corrección publicada
ormar Debian:12
- Versiones
- 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
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
ormar Debian:14
- Versiones
- 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
- Intervalos de versiones afectados
- ECOSYSTEM: < 0.23.1-1
Actualiza a 0.23.1-1
ormar PyPI
- Versiones
- 0.1.0
- 0.1.1
- 0.1.2
- 0.1.3
- 0.10.0
- 0.10.1
- 0.10.10
- 0.10.11
- 0.10.12
- 0.10.13
- 0.10.14
- 0.10.15
- 0.10.16
- 0.10.17
- 0.10.18
- 0.10.19
- 0.10.2
- 0.10.20
- 0.10.21
- 0.10.22
- 0.10.23
- 0.10.24
- 0.10.25
- 0.10.3
- 0.10.4
- 0.10.5
- 0.10.6
- 0.10.7
- 0.10.8
- 0.10.9
- 0.11.0
- 0.11.1
- 0.11.2
- 0.11.3
- 0.12.0
- 0.12.1
- 0.12.2
- 0.12.3
- 0.2.1
- 0.2.2
- 0.20.0
- 0.20.1
- 0.20.2
- 0.21.0
- 0.22.0
- 0.23.0
- 0.3.0
- 0.3.1
- 0.3.10
- 0.3.11
- 0.3.2
- 0.3.3
- 0.3.4
- 0.3.5
- 0.3.6
- 0.3.7
- 0.3.8
- 0.3.9
- 0.4.0
- 0.4.1
- 0.4.2
- 0.4.3
- 0.4.4
- 0.5.0
- 0.5.1
- 0.5.2
- 0.5.3
- 0.5.4
- 0.5.5
- 0.6.0
- 0.6.1
- 0.6.2
- 0.7.0
- 0.7.1
- 0.7.2
- 0.7.3
- 0.7.4
- 0.7.5
- 0.8.0
- 0.8.1
- 0.9.0
- 0.9.1
- 0.9.2
- 0.9.3
- 0.9.4
- 0.9.5
- 0.9.6
- 0.9.7
- 0.9.8
- 0.9.9
- Intervalos de versiones afectados
- ECOSYSTEM: < 0.23.1
Actualiza a 0.23.1
ormar Ubuntu:24.04:LTS
- Versiones
- 0.12.0-3
- 0.12.2-1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
ormar Ubuntu:25.10
- Versiones
- 0.12.2-1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
ormar Ubuntu:26.10
- Versiones
- 0.22.0-1
- 0.24.0-2
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
ormar Ubuntu:26.04:LTS
- Versiones
- 0.12.2-1
- 0.20.2-1
- 0.21.0-1
- 0.22.0-1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
Fuentes originales
- https://github.com/ormar-orm/ormar/security/advisories/GHSA-f964-whrq-44h8
- https://github.com/ormar-orm/ormar/commit/7f22aa21a7614b993970345b392dabb0ccde0ab3
- https://github.com/ormar-orm/ormar/blob/master/examples/fastapi_quick_start.py#L55
- https://github.com/ormar-orm/ormar/blob/master/ormar/fields/foreign_key.py#L41
- https://github.com/ormar-orm/ormar/blob/master/ormar/models/helpers/pydantic.py#L108
- https://github.com/ormar-orm/ormar/blob/master/ormar/models/model.py#L89
- https://github.com/ormar-orm/ormar/blob/master/ormar/models/newbasemodel.py#L128
- https://github.com/ormar-orm/ormar/blob/master/ormar/models/newbasemodel.py#L292
- https://github.com/ormar-orm/ormar/releases/tag/0.23.1
- https://nvd.nist.gov/vuln/detail/CVE-2026-27953