# CVE-2026-128082: AutoMapper: Uncontrolled Recursion with Constructor Parameters

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

AutoMapper is a convention-based object-object mapper in .NET. Prior to 15.1.4 and from 16.0.0 until 16.3.0, AutoMapper increments type depth only after creating the destination, so recursive mapping performed through constructor parameters occurs before MaxDepth is counted. Destinations built through positional records or other constructors, and recursive ConstructUsing mappings that call context.Mapper, can therefore bypass explicit MaxDepth values and the default limit of 64. Deep attacker-influenced input can throw an uncatchable StackOverflowException and terminate the process. This issue is fixed in versions 15.1.4 and 16.3.0.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- LuckyPennySoftware / AutoMapper: >= 16.0.0, < 16.3.0 (affected); < 15.1.4 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-674

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/LuckyPennySoftware/AutoMapper/security/advisories/GHSA-6vhm-j9h7-f9gh (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/LuckyPennySoftware/AutoMapper/commit/4d51a4b8125b4d2302f2f1f455747c9648ad1acb (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/LuckyPennySoftware/AutoMapper/commit/639c2748cb9d3d07df8b86879ba7bcf211675c86 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v15.1.4 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v16.3.0 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-128082; retrieved 2026-11-13; source updated 2026-11-13

Revision: 36747a6e861e8c215c6891ed7611002eb438ead4c8691e2bf36b4f0d4f7922d7

Canonical: https://y2.dev/cve/CVE-2026-128082

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