Improperly Controlled Modification of Dynamically-Determined Object Attributes Affecting ormar package, versions [,0.23.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published20 Mar 2026
- disclosed19 Mar 2026
- creditHussein Aldulaimi
Introduced: 19 Mar 2026
CVE-2026-27953 (opens in a new tab)How to fix?
Upgrade ormar to version 0.23.1 or higher.
Overview
ormar is an An async ORM with fastapi in mind and pydantic validation.
Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes via the model constructor when injecting the __pk_only__ or __excluded__ parameters when used with ormar's canonical FastAPI integration pattern. An attacker can bypass all field validation and persist unvalidated or manipulated data directly to the database by including specially crafted keys in a JSON request body. This can lead to privilege escalation, data integrity violations, and unauthorized modification of sensitive fields.