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Public proof of conceptFix availableAwaiting NVD analysis

CVE-2026-128082

AutoMapper: Uncontrolled Recursion with Constructor Parameters

A public proof of concept exists; no exploitation attested.

  • Published2026-11-13
  • Fixed in16.3.0 · 15.1.4
  • WeaknessCWE-674

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-11-1318:37CVE publishedCNA

Versions per branch

OSV
AutoMapper
BranchAffectedFixed in
16.x≥ 16.0.0, < 16.3.016.3.0
15.1< 15.1.415.1.4

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • LuckyPennySoftware AutoMapper
    Affected
    • = >= 16.0.0, < 16.3.0no fix stated
    • = < 15.1.4no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-13

Fix

  1. Update AutoMapper to 16.3.0 · 15.1.4

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2026-11-13
  • CNACVSS 3.17.52026-11-13
  • CNAweakness (CWE)CWE-6742026-11-13
  • NVDweakness (CWE)CWE-674read 2026-11-13
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2026-11-13

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2026-11-13
Last Modified
2026-11-13
NVD status
Received
GitHub Advisory
GHSA-6vhm-j9h7-f9gh

Frequently asked questions

What is CVE-2026-128082?

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.

Is CVE-2026-128082 actively exploited?

A proof-of-concept exploit exists for CVE-2026-128082, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-128082?

CVE-2026-128082 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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