Is CVE-2026-96233 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-96233 being exploited in the wild.

How severe is CVE-2026-96233?

High severity, with a CVSS score of 7.5, published 13 October 2026.

Which products and versions are affected?

Microsoft .Net 8.0.0 through 8.0.31, 9.0.0 through 9.0.20, 10.0.0 through 10.0.12, 11.0.0-preview.1 through 11.0.0-rc.1; Microsoft.NetCore.App.Runtime.linux-arm (NuGet) >= 10.0.0, = 10.0.0, = 10.0.0, <= 10.0.12; and 9 more.

Is there a fix for CVE-2026-96233?

Yes: fixed in .NET 8.0.32, 9.0.21, 10.0.13, 11.0.0-rc.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-96233 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-96233?

Check whether you run Microsoft .Net, Microsoft.NetCore.App.Runtime.linux-arm (NuGet), Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-96233: .NET System.Runtime DateTime parsing out-of-bounds read

Q: Is there a fix for CVE-2026-96233?

Yes: fixed in .NET 8.0.32, 9.0.21, 10.0.13, 11.0.0-rc.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-96233 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-96233?

Check whether you run Microsoft .Net, Microsoft.NetCore.App.Runtime.linux-arm (NuGet), Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-96233 · Severity: high · CVSS 7.5 · Published 2026-10-13

.NET is the runtime framework that executes applications built on Microsoft's development platform, used across Windows, Linux, and macOS. A flaw in DateTime Hebrew-number parsing can cause an application to crash by reading memory outside expected bounds, leading to denial of service. An attacker with network access could exploit this by sending specially crafted input to trigger the vulnerability in affected .NET applications.

Quick answers

Is CVE-2026-96233 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-96233 being exploited in the wild.
How severe is CVE-2026-96233?: High severity, with a CVSS score of 7.5, published 13 October 2026.
Which products and versions are affected?: Microsoft .Net 8.0.0 through 8.0.31, 9.0.0 through 9.0.20, 10.0.0 through 10.0.12, 11.0.0-preview.1 through 11.0.0-rc.1; Microsoft.NetCore.App.Runtime.linux-arm (NuGet) >= 10.0.0, <= 10.0.12; Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) >= 10.0.0, <= 10.0.12; Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet) >= 10.0.0, <= 10.0.12; and 9 more.
Is there a fix for CVE-2026-96233?: Yes: fixed in .NET 8.0.32, 9.0.21, 10.0.13, 11.0.0-rc.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-96233 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-96233?: Check whether you run Microsoft .Net, Microsoft.NetCore.App.Runtime.linux-arm (NuGet), Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: .NET 8.0.32, 9.0.21, 10.0.13, 11.0.0-rc.2

Technical details

The vulnerability is an out-of-bounds read (CWE-787) in System.Runtime's DateTime Hebrew-number parsing logic that can read outside expected stack bounds and terminate the process. Exploitation requires crafted input to DateTime parsing functions with Hebrew numerals and is network-accessible in applications that accept such input. No authentication is required, and the result is denial of service via process termination.

Affected products

Microsoft .NET 8.0.0 through 8.0.31, 9.0.0 through 9.0.20, 10.0.0 through 10.0.12, 11.0.0-preview.1 through 11.0.0-rc.1

Identifiers

CVE-2026-96233
GHSA-87vj-4hqv-22p9

Timeline

2026-10-13: disclosed

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