CVE-2026-96229
published 2026-10-13CVE-2026-96229: Permissive list of allowed inputs in .NET allows an unauthorized attacker to disclose information over a network.
PriorityP337medium6.5CVSS 3.1
AVNACLPRNUIRSUCHINAN
EPSS
0.95%
61.0th percentile
Permissive list of allowed inputs in .NET allows an unauthorized attacker to disclose information over a network.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_visual_studio_2022_version_17.14 | >= 17.14.0 < 17.14.42 | 17.14.42 |
| microsoft | microsoft_visual_studio_2026_version_18.10 | >= 18.10.0 < 18.10.4 | 18.10.4 |
| microsoft | net_10.0_runtime | >= 10.0.0 < 10.0.13 | 10.0.13 |
| microsoft | net_11.0_runtime | >= 11.0.0 < 11.0.0-rc.2 | 11.0.0-rc.2 |
| microsoft | net_8.0_runtime | >= 8.0.0 < 8.0.32 | 8.0.32 |
| microsoft | net_9.0_runtime | >= 9.0.0 < 9.0.21 | 9.0.21 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
ghsa6.5MEDIUM
vendor_redhat6.5MEDIUM
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VulDB
Microsoft .NET/Visual Studio prior 8.0.32/9.0.21/10.0.13/11.0.0-rc.2 WPF permissive list of allowed inputs
vuldb·2026-10-14·CVSS 6.5
CVE-2026-96229 [MEDIUM] Microsoft .NET/Visual Studio prior 8.0.32/9.0.21/10.0.13/11.0.0-rc.2 WPF permissive list of allowed inputs
A vulnerability, which was classified as problematic, was found in Microsoft .NET and Visual Studio. This impacts an unknown function of the component WPF. Executing a manipulation can lead to permissive list of allowed inputs.
This vulnerability is handled as CVE-2026-96229. The attack can be executed remotely. There is not any exploit available.
You should upgrade the affected component.
GHSA
Microsoft Security Advisory CVE-2026-96229 - .NET and Visual Studio Information Disclosure Vulnerability
ghsa·2026-10-13·CVSS 6.5
CVE-2026-96229 [MEDIUM] CWE-183 Microsoft Security Advisory CVE-2026-96229 - .NET and Visual Studio Information Disclosure Vulnerability
Microsoft Security Advisory CVE-2026-96229 - .NET and Visual Studio Information Disclosure Vulnerability
## Executive summary
Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.WindowsDesktop.App.Runtime (WPF). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
Restrictive XAML and XPS security fixes block unsafe URI fetching and navigation, propagate untrusted-input state through hyperlink navigation, add TrueType font protection and XAML nesting-depth limits, and avoid caching positive DNS zone-policy decisions.
## Announcement
Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/477
## CVSS Details
- **Version:** 3.1
- *
Red Hat
dotnet: .NET Information Disclosure Vulnerability
vendor_redhat·2026-10-13·CVSS 6.5
CVE-2026-96229 [MEDIUM] CWE-183 dotnet: .NET Information Disclosure Vulnerability
dotnet: .NET Information Disclosure Vulnerability
Permissive list of allowed inputs in .NET allows an unauthorized attacker to disclose information over a network.
A flaw was found in .NET. An overly permissive list of allowed inputs can allow an unauthorized remote attacker to disclose sensitive information over the network. Successful exploitation requires user interaction and may lead to unauthorized access to confidential application data.
Package: dotnet8.0 (Red Hat Hardened Images) - Not affected
No detection rules found.
No public exploits indexed.
Sans Isc
October 2026 Microsoft Patch Tuesday, (Tue, Oct 13th)
blogs_sans_isc·2026-10-13·CVSS 8.8
CVE-2026-96951 [HIGH] October 2026 Microsoft Patch Tuesday, (Tue, Oct 13th)
October 2026 Microsoft Patch Tuesday
Published: 2026-10-13. Last Updated: 2026-10-13 19:25:52 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
Microsoft today released patches for 1,417 vulnerabilities. 76 of these vulnerabilities are rated critical, with 7 critical vulnerabiilties requiring no customer actions. One vulnerability was disclosed before today's patch Tuesday, and one is already exploited.
CVE-2026-96951: An already exploited Windows Shell Security Feature Bypass Vulnerability. This vulnerabliity allows bypassing the "Mark of the Web" making it easier to exeucte code by sending a malicious message to a user via e-mail or instant messaging. The victim will still have to open the file.
CVE-2026-108398: This vulnerability, a .NET framework security feature bypass, could be
Rapid7
Patch Tuesday - October 2026
blogs_rapid7·2026-10-13·CVSS 8.8
CVE-2026-96951 [HIGH] Patch Tuesday - October 2026
Microsoft is publishing 1,413 own-product vulnerabilities on October 2026 Patch Tuesday , including 1,102 vulnerabilities in Windows. Anyone who enjoyed last month’s record-setting Patch Tuesday will love the October 2026 edition, because it’s much bigger still. As Rapid7 has noted over the course of 2026, there is every reason to suppose that vulnerability volumes will continue to rise. Microsoft is aware of exploitation in the wild for just one of the vulnerabilities published today, as well as public disclosure for two others.
## Windows Shell: zero-day security feature bypass
The Windows Shell is Microsoft’s term for the GUI interaction logic for the entire OS provided by explorer.exe and associated libraries and APIs, and for the second time this year , the Windows Shell is the site
Bugzilla
CVE-2026-96959 dotnet10.0: .NET: Denial of Service via unthrottled resource allocation [fedora-43]
bugzilla·2026-10-23·CVSS 8.8
CVE-2026-96959 [HIGH] CVE-2026-96959 dotnet10.0: .NET: Denial of Service via unthrottled resource allocation [fedora-43]
CVE-2026-96959 dotnet10.0: .NET: Denial of Service via unthrottled resource allocation [fedora-43]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a network.
Discussion:
Closing/resolving as this was fixed in https://bodhi.fedoraproject.org/updates/FEDORA-2026-c7c459ff4d
Update to .NET SDK 10.0.113 and Runtime 10.0.13
Fixes: CVE-2026-102870,CVE-2026-105016,CVE-2026-58280,CVE-2026-66822,CVE-2026-69651,CVE-2026-70007,CVE-2026-70035,CVE-2026-70159,CVE-2026-70161,CVE-2026-70162,CVE-2026-70165,CVE-2026-7
Bugzilla
CVE-2026-96229 dotnet: .NET Information Disclosure Vulnerability
bugzilla·2026-10-13·CVSS 6.5
CVE-2026-96229 [MEDIUM] CVE-2026-96229 dotnet: .NET Information Disclosure Vulnerability
CVE-2026-96229 dotnet: .NET Information Disclosure Vulnerability
Permissive list of allowed inputs in .NET allows an unauthorized attacker to disclose information over a network.
Affected products:
- .NET Windows Desktop Runtime (release 11.0): 11.0.0-preview.1 - 11.0.0-rc.1; fixed 11.0.0-rc.2
- .NET Windows Desktop Runtime (release 9.0): 9.0.0 - 9.0.20; fixed 9.0.21
- .NET Windows Desktop Runtime (release 10.0): 10.0.0 - 10.0.12; fixed 10.0.13
- .NET Windows Desktop Runtime (release 8.0): 8.0.0 - 8.0.31; fixed 8.0.32
2026-10-13
Published