Vulnerability in Microsoft Openapi.net
CVE-2026-49451
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 docum…
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Microsoft Openapi.net — versions >= 2.0.0-preview11, < 2.7.5, >= 3.0.0, < 3.5.4
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-49451?
- CVE-2026-49451 is a high-severity vulnerability in Microsoft Openapi.net, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-06-30.
- How severe is CVE-2026-49451?
- High severity. CVSS v3 base score is 7.5 out of 10.