---
title: "Microsoft.OpenApi.YamlReader — CVE-2026-72923"
description: "A denial of service flaw affects the NuGet package Microsoft.OpenApi.YamlReader. Affected versions: >= 3.0.0, < 3.10.0. Fixed from version 3.10.0. CVSS score 7.5."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-10-14-cve-2026-72923
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-10-14
dateModified: 2026-10-14
---
# Microsoft.OpenApi.YamlReader — CVE-2026-72923

A denial of service flaw affects the NuGet package Microsoft.OpenApi.YamlReader. Affected versions: >= 3.0.0, < 3.10.0. Fixed from version 3.10.0. CVSS score 7.5.

## What to do

Update Microsoft.OpenApi.YamlReader to 3.10.0 or later.

| Fact | Value |
| --- | --- |
| Package | Microsoft.OpenApi.YamlReader |
| Ecosystem | NuGet (.NET) |
| Class | Denial of service |
| Affected versions | >= 3.0.0, < 3.10.0 |
| Fixed version | 3.10.0 |
| CVSS | 7.5 |
| CVE | CVE-2026-72923 |
| GHSA | GHSA-7pxr-59rr-hqj2 |
| Published on | October 14, 2026 |
| Severity | High |

## Sources

- [GitHub Security Advisory — GHSA-7pxr-59rr-hqj2](https://github.com/advisories/GHSA-7pxr-59rr-hqj2) — GitHub Security Advisories
- [NVD — CVE-2026-72923](https://nvd.nist.gov/vuln/detail/CVE-2026-72923) — NVD

---

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