Vulnerability · CVE-2026-50524
Microsoft Security Advisory CVE-2026-50524 – .NET Denial of Service Vulnerability
Published Jul 20, 2026 · catalog updated Nov 4, 2026 · Microsoft Security Advisory –
Last checked Nov 6, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-50524. EPSS is 1.23%. Act only if a listed version of Microsoft Security Advisory – is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (Microsoft Security Advisory –).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 1.23%
- Remediation
- Advisory link
- Affected products
- NuGet Microsoft.NetCore.App.Runtime.linux-arm · NuGet Microsoft.NetCore.App.Runtime.linux-arm64 · NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm · NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm64 · NuGet Microsoft.NetCore.App.Runtime.linux-musl-x64 · NuGet Microsoft.NetCore.App.Runtime.linux-x64
## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET TLS/SSL (System.Net.Security). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in .NET 8, .NET 9, and .NET 10 when processing TLS handshakes. An attacker can send a malformed request and cause application to crash or become unresponsive. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/413 ## CVSS Details - **Version:** 3.1 - **Severity:** High - **Score:** 7.5 - **Vector:** - **Weakness:** CWE-1287 (Improper Validation of Specified Type of Input) ## Affected Platforms - **Platforms:** All - **Architectures:** All ## Affected Packages The vulnerability affects any Microsoft .NET project if it uses any of affected package versions listed below ### .NET 10.0 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, .NET 9.0 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, .NET 8.0 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, How do
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- NuGet Microsoft.NetCore.App.Runtime.linux-arm10.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-arm6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm10.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-musl-x6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-x6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.osx-arm6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.osx-x6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.win-arm10.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.win-arm6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.win-x6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.win-x8610.0.0 → 10.0.10
How to fix CVE-2026-50524
Upgrade
CVE-2026-50524 lists a fix boundary at 10.0.10. Compare the installed build with that boundary before you change production.
Version check
Seen in 10.0.0 → 10.0.10 · 5 other packages on the advisory
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-50524. EPSS is 1.23%. Act only if a listed version of Microsoft Security Advisory – is installed.
Which versions are affected?
Compare what you have installed with Microsoft.NetCore.App.Runtime.linux-arm 10.0.0 → 10.0.10; Microsoft.NetCore.App.Runtime.linux-arm64 10.0.0 → 10.0.10; Microsoft.NetCore.App.Runtime.linux-musl-arm 10.0.0 → 10.0.10; Microsoft.NetCore.App.Runtime.linux-musl-arm64 10.0.0 → 10.0.10. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-1287. EPSS 1.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Jul 20, 2026 · GitHub Advisory Database
Detected
## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET TLS/SSL (System.Net.Security). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in .NET 8, .NET 9, and .NET 10 when processing TLS handshakes. An attacker can send a
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-arm fixed in 10.0.10; Microsoft.NetCore.App.Runtime.linux-arm64 fixed in 10.0.10; Microsoft.NetCore.App.Runtime.linux-musl-arm fixed in 10.0.10; Microsoft.NetCore.App.Runtime.linux-musl-arm64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-arm fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-arm64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-musl-arm fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-musl-arm64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-musl-x64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-x64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.osx-arm64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.osx-x64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.win-arm fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.win-arm64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.win-x64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.win-x86 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Updated
## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET TLS/SSL (System.Net.Security). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in .NET 8, .NET 9, and .NET 10 when processing TLS handshakes. An attacker can send a
Sources
- CVE.orgVulnerability recordCVE-2026-50524
Official CVE identifier
cve.org - GitHub Advisory DatabasePackage advisoryGHSA-w7cw-xp7h-6j5j
GitHub Advisory Database record mirrored by OSV.
github.com - OpenSSF OSV / OSV ScannerPackage advisoryGHSA-w7cw-xp7h-6j5j
Microsoft Security Advisory CVE-2026-50524 – .NET Denial of Service Vulnerability
osv.dev
References
Freshness
Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- GitHub Advisory DatabaseNov 6, 2026
- OpenSSF OSV / OSV ScannerNov 6, 2026
- CVE.orgNov 4, 2026