PyPi: Pydantic

CVE-2021-29510

Safety vulnerability ID: 40440

This vulnerability was reviewed by experts

The information on this page was manually curated by our Cybersecurity Intelligence Team.

Created at May 13, 2021 Updated at Dec 18, 2025
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Advisory

[This advisory has been limited. Please create a free account to view the full advisory.]

Affected package

pydantic

Latest version: 2.12.5

Data validation using Python type hints

Affected versions

[This affected versions has been limited. Please create a free account to view the full affected versions.]

Fixed versions

[This fixed versions has been limited. Please create a free account to view the full fixed versions.]

Vulnerability changelog

!!! warning
A security vulnerability, level "moderate" is fixed in v1.8.2. Please upgrade **ASAP**.
See security advisory [CVE-2021-29510](https://github.com/samuelcolvin/pydantic/security/advisories/GHSA-5jqp-qgf6-3pvh)

* **Security fix:** Fix `date` and `datetime` parsing so passing either `'infinity'` or `float('inf')`
(or their negative values) does not cause an infinite loop,
see security advisory [CVE-2021-29510](https://github.com/samuelcolvin/pydantic/security/advisories/GHSA-5jqp-qgf6-3pvh)
* fix schema generation with Enum by generating a valid name, 2575 by PrettyWood
* fix JSON schema generation with a `Literal` of an enum member, 2536 by PrettyWood
* Fix bug with configurations declarations that are passed as
keyword arguments during class creation, 2532 by uriyyo
* Allow passing `json_encoders` in class kwargs, 2521 by layday
* support arbitrary types with custom `__eq__`, 2483 by PrettyWood
* support `Annotated` in `validate_arguments` and in generic models with python 3.9, 2483 by PrettyWood

Resources

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Severity Details

CVSS Base Score

HIGH 7.5

CVSS v3 Details

HIGH 7.5
Attack Vector (AV)
NETWORK
Attack Complexity (AC)
LOW
Privileges Required (PR)
NONE
User Interaction (UI)
NONE
Scope (S)
UNCHANGED
Confidentiality Impact (C)
NONE
Integrity Impact (I)
NONE
Availability Availability (A)
HIGH

CVSS v2 Details

MEDIUM 5.0
Access Vector (AV)
NETWORK
Access Complexity (AC)
LOW
Authentication (Au)
NONE
Confidentiality Impact (C)
NONE
Integrity Impact (I)
NONE
Availability Impact (A)
PARTIAL