TI-2026-25381 Aliases CVE-2026-32933 GHSA-rvv3-g6hj-g44x

AutoMapper Vulnerable to Denial of Service (DoS) via Uncontrolled Recursion

HIGH 66CWE-674Published 2026-03-20 · Updated 2026-03-20

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-674.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00564 47th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed AutoMapper (LuckyPennySoftware): 16.1.1, 15.1.1AutoMapper (NuGet): 16.1.1, 15.1.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
LuckyPennySoftware	AutoMapper	16.0.0 to before 16.1.1; before 15.1.1	16.1.1, 15.1.1	Patch available	CNA
—	AutoMapper (NuGet)	16.0.0 to before 16.1.1	16.1.1	Patch available	GHSA-rvv3-g6hj-g44x
—	AutoMapper (NuGet)	before 15.1.1	15.1.1	Patch available	GHSA-rvv3-g6hj-g44x

AutoMapper VendorLuckyPennySoftware Affected 16.0.0 to before 16.1.1; before 15.1.1 Fixed in 16.1.1, 15.1.1 Patch available CNA
AutoMapper (NuGet) Vendor— Affected 16.0.0 to before 16.1.1 Fixed in 16.1.1 Patch available GHSA-rvv3-g6hj-g44x
AutoMapper (NuGet) Vendor— Affected before 15.1.1 Fixed in 15.1.1 Patch available GHSA-rvv3-g6hj-g44x

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:luckypennysoftware:automapper::::::::	before 15.1.1; 16.0.0 to before 16.1.1	Vulnerable	LuckyPennySoftware

cpe:2.3:a:luckypennysoftware:automapper:*:*:*:*:*:*:*:* Versions before 15.1.1; 16.0.0 to before 16.1.1 Vulnerable ·LuckyPennySoftware

Remediation

Fix · CNA AutoMapper (LuckyPennySoftware) Fixed in 16.1.1, 15.1.1
Fix · GHSA-rvv3-g6hj-g44x AutoMapper (NuGet) Fixed in 16.1.1 Advisory →
Fix · GHSA-rvv3-g6hj-g44x AutoMapper (NuGet) Fixed in 15.1.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-32933
2026-10-03 Alias added: GHSA-rvv3-g6hj-g44x
2026-10-25 EPSS moved to the below the 50th percentile

References

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences