Description
Pydantic is a data validation and settings management using Python type hinting. In affected versions passing either `'infinity'`, `'inf'` or `float('inf')` (or their negatives) to `datetime` or `date` fields causes validation to run forever with 100% CPU usage (on one CPU). Pydantic has been patched with fixes available in the following versions: v1.8.2, v1.7.4, v1.6.2. All these versions are available on pypi(https://pypi.org/project/pydantic/#history), and will be available on conda-forge(https://anaconda.org/conda-forge/pydantic) soon. See the changelog(https://pydantic-docs.helpmanual.io/) for details. If you absolutely can't upgrade, you can work around this risk using a validator(https://pydantic-docs.helpmanual.io/usage/validators/) to catch these values. This is not an ideal solution (in particular you'll need a slightly different function for datetimes), instead of a hack like this you should upgrade pydantic. If you are not using v1.8.x, v1.7.x or v1.6.x and are unable to upgrade to a fixed version of pydantic, please create an issue at https://github.com/samuelcolvin/pydantic/issues requesting a back-port, and we will endeavour to release a patch for earlier versions of pydantic.
Published: 2021-05-13
Score: 3.3 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-0206 Pydantic is a data validation and settings management using Python type hinting. In affected versions passing either `'infinity'`, `'inf'` or `float('inf')` (or their negatives) to `datetime` or `date` fields causes validation to run forever with 100% CPU usage (on one CPU). Pydantic has been patched with fixes available in the following versions: v1.8.2, v1.7.4, v1.6.2. All these versions are available on pypi(https://pypi.org/project/pydantic/#history), and will be available on conda-forge(https://anaconda.org/conda-forge/pydantic) soon. See the changelog(https://pydantic-docs.helpmanual.io/) for details. If you absolutely can't upgrade, you can work around this risk using a validator(https://pydantic-docs.helpmanual.io/usage/validators/) to catch these values. This is not an ideal solution (in particular you'll need a slightly different function for datetimes), instead of a hack like this you should upgrade pydantic. If you are not using v1.8.x, v1.7.x or v1.6.x and are unable to upgrade to a fixed version of pydantic, please create an issue at https://github.com/samuelcolvin/pydantic/issues requesting a back-port, and we will endeavour to release a patch for earlier versions of pydantic.
Github GHSA Github GHSA GHSA-5jqp-qgf6-3pvh Use of "infinity" as an input to datetime and date fields causes infinite loop in pydantic
Ubuntu USN Ubuntu USN USN-6553-1 Pydantic vulnerability
History

Mon, 08 Dec 2025 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Pydantic
Pydantic pydantic
CPEs cpe:2.3:a:pydantic_project:pydantic:*:*:*:*:*:*:*:* cpe:2.3:a:pydantic:pydantic:*:*:*:*:*:*:*:*
Vendors & Products Pydantic Project
Pydantic Project pydantic
Pydantic
Pydantic pydantic

Subscriptions

Fedoraproject Fedora
Pydantic Pydantic
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2024-08-03T22:11:05.442Z

Reserved: 2021-03-30T00:00:00.000Z

Link: CVE-2021-29510

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-05-13T19:15:08.023

Modified: 2025-12-08T16:46:19.440

Link: CVE-2021-29510

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses