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CVE-2026-128081 AutoMapper: Denial of Service via uncontrolled recursion that bypasses MaxDepth

7.5 highFix available

High (7.5) in luckypennysoftware automapper. Fixed in AutoMapper 15.1.4, 16.3.0.

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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 can recurse without an effective MaxDepth limit when mapping polymorphic graphs through Include or IncludeBase, runtime-typed object or interface members, nested Dictionary<string, object> or ExpandoObject sources, or recursive ConvertUsing type converters. Deep attacker-influenced graphs on these paths can throw an uncatchable StackOverflowException and terminate the process. This issue is fixed in versions 15.1.4 and 16.3.0.

Severity

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
CWE
CWE-674 Uncontrolled Recursion
Published
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.

ProductAffected
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)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-gpwp-5797-mjffNuGetAutoMapper>=16.0.0 <16.3.016.3.0
GHSA-gpwp-5797-mjffNuGetAutoMapper<15.1.415.1.4

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

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