What’s Vulnerable › Vulnerabilities

CVE-2026-57099: ASP.NET Core Denial of Service Vulnerability

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-08 · updated 2026-10-31
• Weakness: CWE-770

Description

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Affected products

• Microsoft AspNetCore.OData: before 7.8.1 — fixed in 7.8.1
• Microsoft AspNetCore.OData: from 9.0.0 before 7.8.1 — fixed in 7.8.1

How to fix

Upgrade to a fixed version: Microsoft AspNetCore.OData 7.8.1; Microsoft AspNetCore.OData 7.8.1. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57099

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