{"id":"GHSA-rvv3-g6hj-g44x","revision":null,"records":[{"revision":"1684e01aef6d4f3db7522ef9138cf143","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-32933","aliases":[],"title":"AutoMapper Vulnerable to Denial of Service (DoS) via Uncontrolled Recursion","description":"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.","state":0,"publishedAt":"2026-03-20T02:38:41.105+00:00","modifiedAt":"2026-03-20T20:02:58.558+00:00","affected":[{"ecosystem":"Vendor product","name":"AutoMapper","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"LuckyPennySoftware\",\n                    \"product\": \"AutoMapper\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 16.0.0, < 16.1.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"< 15.1.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/LuckyPennySoftware/AutoMapper/security/advisories/GHSA-rvv3-g6hj-g44x","https://github.com/LuckyPennySoftware/AutoMapper/commit/0afaf1e91648fca1a57512e94dd00a76ee016816","https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v15.1.1","https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v16.1.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-32933","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-32933","identifiers":["CVE-2026-32933"]},"retained":false,"historicalAffected":[]},{"revision":"a7fb09fa65c44d05aed62abbc0bd96e4","observedAt":"2026-11-13T13:08:42.235+00:00","statement":{"source":"euvd","id":"EUVD-2026-13505","aliases":["CVE-2026-32933"],"title":"AutoMapper is a convention-based object-object mapper in .NET. 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Versions 15.1.1 and 16.1.1 fix the issue.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":null}],"references":["https://github.com/LuckyPennySoftware/AutoMapper/security/advisories/GHSA-rvv3-g6hj-g44x","https://github.com/LuckyPennySoftware/AutoMapper/commit/0afaf1e91648fca1a57512e94dd00a76ee016816","https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v15.1.1","https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v16.1.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-13505","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Mar 20, 2026, 2:38:41 AM","dateUpdated":"Mar 20, 2026, 8:02:58 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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Versions 15.1.1 and 16.1.1 fix the issue.","state":0,"publishedAt":"2026-03-20T03:16:00.43+00:00","modifiedAt":"2026-06-17T10:36:35.263+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/LuckyPennySoftware/AutoMapper/commit/0afaf1e91648fca1a57512e94dd00a76ee016816","https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v15.1.1","https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v16.1.1","https://github.com/LuckyPennySoftware/AutoMapper/security/advisories/GHSA-rvv3-g6hj-g44x"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-32933","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-674"],"productCriteria":["cpe:2.3:a:luckypennysoftware:automapper:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-03-20T03:16:00.430","lastModified":"2026-06-17T10:36:35.263"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. 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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.\n\nBecause 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.\n\n### Impact\n\n* **Availability:** An attacker can crash the application server, leading to a complete Denial of Service.\n* **Process Termination:** Unlike standard exceptions, this terminates the entire process, not just the individual request thread.\n\n### Proof of Concept (PoC)\n\nThe following C# code demonstrates the crash by creating a nested \"Circular\" object graph and attempting to map it:\n\n```csharp\nclass Circular { public Circular Self { get; set; } }\n\n// Setup configuration\nvar config = new MapperConfiguration(cfg => {\n    cfg.CreateMap<Circular, Circular>();\n});\nvar mapper = config.CreateMapper();\n\n// Create a deeply nested object (28,000+ levels)\nvar root = new Circular();\nvar current = root;\nfor (int i = 0; i < 30000; i++) {\n    current.Self = new Circular();\n    current = current.Self;\n}\n\n// This call triggers the StackOverflowException and crashes the process\nmapper.Map<Circular>(root);\n\n```\n\n### Recommended Mitigation\n\n1. **Secure Defaults:** Implement a default `MaxDepth` (e.g., 32 or 64) for all mapping operations.\n2. **Configurable Limit:** Allow users to increase this limit if necessary, but ensure it is enabled by default to protect unsuspecting 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