Pydantic up to 1.10.12/2.3.x Email redos

Summaryinfo

A vulnerability categorized as problematic has been discovered in Pydantic up to 1.10.12/2.3.x. This impacts an unknown function of the component Email Handler. Executing a manipulation can lead to redos. This vulnerability is tracked as CVE-2024-3772. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Pydantic up to 1.10.12/2.3.x. This vulnerability affects an unknown functionality of the component Email Handler. The manipulation with an unknown input leads to a redos vulnerability. The CWE definition for the vulnerability is CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. As an impact it is known to affect availability. CVE summarizes:

Regular expression denial of service in Pydanic < 2.4.0, < 1.10.13 allows remote attackers to cause denial of service via a crafted email string.

The advisory is shared for download at github.com. This vulnerability was named CVE-2024-3772 since 04/15/2024. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1449.003.

The vulnerability scanner Nessus provides a plugin with the ID 214905 (SUSE SLED15 / SLES15 / openSUSE 15 Security Update : python-pydantic (SUSE-SU-2025:0310-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.10.13 or 2.4.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (214905). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• Pydantic

Version

• 1.10.0
• 1.10.1
• 1.10.2
• 1.10.3
• 1.10.4
• 1.10.5
• 1.10.6
• 1.10.7
• 1.10.8
• 1.10.9
• 1.10.10
• 1.10.11
• 1.10.12
• 2.0
• 2.1
• 2.2
• 2.3

Website

• Product: https://github.com/pydantic/pydantic/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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