CVE-2026-32933
No CISA KEV listing is included in this saved record. Exploitation may still have occurred.
FIRST EPSS: 0.60 % · percentile 49.45 % · scored 15 Nov 2026.
Saved 15 Nov 2026 14:45:34 UTC · View this risk record (JSON)
CVE-2026-32933
AutoMapper Vulnerable to Denial of Service (DoS) via Uncontrolled Recursion
CVSS 3.1 7.5 HIGHEUVD CVSS 3.1 7.5 CVSS 3.1 · [email protected] · Secondary 7.5 HIGHCVSS_V3 Publisher rating HIGHFixed by AutoMapper 16.1.1Fixed by AutoMapper 15.1.1KEV status unknown
cve-program · CVE-2026-32933
PublishedAutoMapper 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.
Read the publisher's advisoryeuvd · EUVD-2026-13505
PublishedAutoMapper 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.
Read the publisher's advisorynvd · CVE-2026-32933
PublishedAutoMapper 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.
Read the publisher's advisoryosv · GHSA-rvv3-g6hj-g44x
Published### Summary AutoMapper is 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. ### Description The vulnerability exists in the core mapping engine. When a source object contains a property of the same type (or a type that eventually points back to itself), AutoMapper recursively attempts to map each level. Because there is no default limit on how many levels deep this recursion can go, a sufficiently nested object (approximately 25,000+ levels in standard .NET environments) will exceed the stack size. Since `StackOverflowException` cannot be caught in modern .NET runtimes, the application cannot recover and will crash immediately. ### Impact * **Availability:** An attacker can crash the application server, leading to a complete Denial of Service. * **Process Termination:** Unlike standard exceptions, this terminates the entire process, not just the individual request thread. ### Proof of Concept (PoC) The following C# code demonstrates the crash by creating a nested "Circular" object graph and attempting to map it: ```csharp class Circular { public Circular Self { get; set; } } // Setup configuration var config = new MapperConfiguration(cfg => { cfg.CreateMap<Circular, Circular>(); }); var mapper = config.CreateMapper(); // Create a deeply nested object (28,000+ levels) var root = new Circular(); var current = root; for (int i = 0; i < 30000; i++) { current.Self = new Circular(); current = current.Self; } // This call triggers the StackOverflowException and crashes the process mapper.Map<Circular>(root); ``` ### Recommended Mitigation 1. **Secure Defaults:** Implement a default `MaxDepth` (e.g., 32 or 64) for all mapping operations. 2. **Configurable Limit:** Allow users to increase this limit if necessary, but ensure it is enabled by default to protect unsuspecting developers.
Read the publisher's advisoryAffected versions, risk and source history
Exploitation and risk
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cve-program · CVE-2026-32933
PublishedAutoMapper Vulnerable to Denial of Service (DoS) via Uncontrolled Recursion
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.
- Source published
- 20 Mar 2026 02:38:41 UTC
- Source modified
- 20 Mar 2026 20:02:58 UTC
- Saved here
- 23 Oct 2026 15:48:27 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
euvd · EUVD-2026-13505
PublishedAutoMapper 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…
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.
Additional publisher context
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Mar 20, 2026, 2:38:41 AM
dateUpdated: Mar 20, 2026, 8:02:58 PM
- Source published
- Mar 20, 2026, 2:38:41 AM (timezone not stated)
- Source modified
- Mar 20, 2026, 8:02:58 PM (timezone not stated)
- Saved here
- 15 Nov 2026 14:05:57 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
EUVD CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd · CVE-2026-32933
PublishedAutoMapper 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…
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.
Additional publisher context
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Analyzed
Weakness classifications: CWE-674
Original publisher date fields
published: 2026-03-20T03:16:00.430
lastModified: 2026-06-17T10:36:35.263
1 source CPE criteria · context only
- cpe:2.3:a:luckypennysoftware:automapper:*:*:*:*:*:*:*:*
The original JSON retains the logical configuration operators, exclusions and version bounds.
- Source published
- 20 Mar 2026 03:16:00 UTC
- Source modified
- 17 Jun 2026 10:36:35 UTC
- Saved here
- 25 Oct 2026 07:19:26 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
Original source record · Cite this exact observation · Complete original publisher JSON
Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · [email protected] · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv · GHSA-rvv3-g6hj-g44x
PublishedAutoMapper Vulnerable to Denial of Service (DoS) via Uncontrolled Recursion
### Summary AutoMapper is 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. ### Description The vulnerability exists in the core mapping engine. When a source object contains a property of the same type (or a type that eventually points back to itself), AutoMapper recursively attempts to map each level. Because there is no default limit on how many levels deep this recursion can go, a sufficiently nested object (approximately 25,000+ levels in standard .NET environments) will exceed the stack size. Since `StackOverflowException` cannot be caught in modern .NET runtimes, the application cannot recover and will crash immediately. ### Impact * **Availability:** An attacker can crash the application server, leading to a complete Denial of Service. * **Process Termination:** Unlike standard exceptions, this terminates the entire process, not just the individual request thread. ### Proof of Concept (PoC) The following C# code demonstrates the crash by creating a nested "Circular" object graph and attempting to map it: ```csharp class Circular { public Circular Self { get; set; } } // Setup configuration var config = new MapperConfiguration(cfg => { cfg.CreateMap<Circular, Circular>(); }); var mapper = config.CreateMapper(); // Create a deeply nested object (28,000+ levels) var root = new Circular(); var current = root; for (int i = 0; i < 30000; i++) { current.Self = new Circular(); current = current.Self; } // This call triggers the StackOverflowException and crashes the process mapper.Map<Circular>(root); ``` ### Recommended Mitigation 1. **Secure Defaults:** Implement a default `MaxDepth` (e.g., 32 or 64) for all mapping operations. 2. **Configurable Limit:** Allow users to increase this limit if necessary, but ensure it is enabled by default to protect unsuspecting developers.
- Source published
- 13 Mar 2026 20:57:07 UTC
- Source modified
- 10 Sep 2026 03:50:41 UTC
- Saved here
- 23 Oct 2026 16:01:25 UTC
- Source terms
- GitHub Advisory Database · CC-BY-4.0
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Publisher rating · HIGH