LuckyPennySoftware AutoMapper up to 15.1.0/16.1.0 Object Graph recursion

Summaryinfo

A vulnerability categorized as problematic has been discovered in LuckyPennySoftware AutoMapper up to 15.1.0/16.1.0. Affected is an unknown function of the component Object Graph Handler. Executing a manipulation can lead to recursion. This vulnerability is handled as CVE-2026-32933. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in LuckyPennySoftware AutoMapper up to 15.1.0/16.1.0. This vulnerability affects an unknown functionality of the component Object Graph Handler. The manipulation with an unknown input leads to a recursion vulnerability. The CWE definition for the vulnerability is CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. As an impact it is known to affect availability. CVE summarizes:

AutoMapper is a convention-based object-object mapper in .NET. Versions prior to 15.1.1 and 16.1.1 are vulnerable to a Denial of Service (DoS) attack. When mapping deeply nested object graphs, the library uses recursive method calls without enforcing a default maximum depth limit. This allows an attacker to provide a specially crafted object graph that exhausts the thread's stack memory, triggering a `StackOverflowException` and causing the entire application process to terminate. Versions 15.1.1 and 16.1.1 fix the issue.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-32933 since 03/17/2026. The exploitation appears to be easy. 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 T1499.

Upgrading to version 15.1.1 or 16.1.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 0afaf1e91648fca1a57512e94dd00a76ee016816 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.

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Productinfo

Vendor

• LuckyPennySoftware

Name

• AutoMapper

Version

• 15.0
• 15.1.0
• 16.0
• 16.1.0

License

• open-source

Website

• Product: https://github.com/LuckyPennySoftware/AutoMapper/

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