Microsoft Openapi.net vulnerabilities

2 CVEs affecting Microsoft Openapi.net, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-72923, published 2026-09-08.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2026-72923, published 2026-09-08. High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days. 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. In…
• CVE-2026-49451, published 2026-06-30. High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days. 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…