CVE-2026-42899

ASP.NET Core Denial of Service Vulnerability

HIGH

7.5

CVSS Score

Published: May 12, 2026 at 04:59 PM UTC

Updated: October 26, 2026 at 06:10 PM UTC

1 product affected across 1 vendor.net· also runs on 3 platforms

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Severity

HIGH7.5

Exploit prediction

EPSS 2%

SSVC

No known exploit

Description

Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

95%

10.0.0 ≤ v < 10.0.88.0.0 ≤ v < 8.0.279.0.0 ≤ v < 9.0.1610.0.0 8.0.0 9.0.0

Affected range stops below 10.0.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.0.27, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.0.16, so it looks safe — our inference, not a vendor statement

apple-macos (environment) · linux-linux-kernel (environment) · microsoft-windows (environment)

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

95%

95%

95%

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references