CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-128082 AutoMapper: Uncontrolled Recursion with Constructor Parameters
High (7.5) in luckypennysoftware automapper. Fixed in AutoMapper 15.1.4, 16.3.0.
On this page
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.
Severity
- CISA's assessment (SSVC)
- Exploitation: PoC · Automatable: yes · Technical impact: partial, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-674 Uncontrolled Recursion
- Published
- Modified
- Assigned by
- GitHub_M (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| LuckyPennySoftware AutoMapper | >= 16.0.0, < 16.3.0 |
| LuckyPennySoftware AutoMapper | < 15.1.4 |
Fix and patched versions
AutoMapper(NuGet): fixed in 16.3.0, 15.1.4
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-6vhm-j9h7-f9gh | NuGet | AutoMapper | >=16.0.0 <16.3.0 | 16.3.0 |
| GHSA-6vhm-j9h7-f9gh | NuGet | AutoMapper | <15.1.4 | 15.1.4 |
Attack patterns (CAPEC)
- CAPEC-230 Serialized Data with Nested Payloads Likelihood: Medium · Severity: High
- CAPEC-231 Oversized Serialized Data Payloads Likelihood: Medium · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.
References
- https://github.com/LuckyPennySoftware/AutoMapper/commit/4d51a4b8125b4d2302f2f1f455747c9648ad1acb
- https://github.com/LuckyPennySoftware/AutoMapper/commit/639c2748cb9d3d07df8b86879ba7bcf211675c86
- https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v15.1.4
- https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v16.3.0
- https://github.com/LuckyPennySoftware/AutoMapper/security/advisories/GHSA-6vhm-j9h7-f9gh