{"id":"EUVD-2026-40365","revision":"0b1e1f0d73fe42e0aae0f29e28e4e864","records":[{"revision":"0b1e1f0d73fe42e0aae0f29e28e4e864","observedAt":"2026-11-05T10:41:56.279+00:00","statement":{"source":"euvd","id":"EUVD-2026-40365","aliases":["CVE-2026-49451","GHSA-v5pm-xwqc-g5wc"],"title":"The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model. From 2.0.0-preview11 until 2.7.5 and 3.5.4, a small OpenAPI docume…","description":"The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model. From 2.0.0-preview11 until 2.7.5 and 3.5.4, a small OpenAPI document containing a circular schema reference can cause process termination through stack overflow in Microsoft.OpenApi. The issue affects OpenAPI document parsing through public OpenAPI.NET reader APIs and has been confirmed across both JSON and YAML reader paths. This vulnerability is fixed in 2.7.5 and 3.5.4.","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/microsoft/OpenAPI.NET/security/advisories/GHSA-v5pm-xwqc-g5wc"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-40365","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 30, 2026, 4:01:00 PM","dateUpdated":"Jun 30, 2026, 6:58:34 PM"},"relatedAdvisories":[],"note":"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."},"key":"euvd:EUVD-2026-40365","identifiers":["EUVD-2026-40365","CVE-2026-49451","GHSA-v5pm-xwqc-g5wc"]},"retained":false,"historicalAffected":[]}],"coverage":[]}