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.
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-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 |
GHSA-5jqp-qgf6-3pvh | Use of "infinity" as an input to datetime and date fields causes infinite loop in pydantic |
Ubuntu USN |
USN-6553-1 | Pydantic vulnerability |
References
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:pydantic:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Pydantic Project
Pydantic Project pydantic |
Pydantic
Pydantic pydantic |
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2024-08-03T22:11:05.442Z
Reserved: 2021-03-30T00:00:00.000Z
Link: CVE-2021-29510
No data.
Status : Modified
Published: 2021-05-13T19:15:08.023
Modified: 2025-12-08T16:46:19.440
Link: CVE-2021-29510
No data.
OpenCVE Enrichment
No data.
Weaknesses
EUVD
Github GHSA
Ubuntu USN