Red Hat Security Advisory: .NET 9.0 security update
Affects Red Hat .NET 9.0Source GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.5 High · fixed in Red Hat package updates : patch Red Hat microsoft.net soon.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 1.2% chance of exploitation in 30 days – higher than 69% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 10.0.13, 11.0.0-rc.2, 8.0.32 +6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:CExploitation evidence
Disclosed: evidence found.
CVE published 13 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft.NET 10.0 runtime | Affected
| Fixed in
|
| Microsoft.NET 11.0 runtime | Affected
| Fixed in
|
| Microsoft.NET 8.0 runtime | Affected
| Fixed in
|
| Microsoft.NET 9.0 runtime | Affected
| Fixed in
|
| MicrosoftMicrosoft .NET Framework 3.5 | Affected
| Fixed in– |
| MicrosoftMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
.NET is a fast, lightweight and modular platform for creating cross platform applications that work on Linux, macOS and Windows. It particularly focuses on creating console applications, web applications and micro-services. .NET contains a runtime conforming to .NET Standards a set of framework libraries, an SDK containing compilers and a 'dotnet' application to drive everything. SDK version: 9.0.122 Runtime version: 9.0.21 Security Fix(es): * dotnet10.0: dotnet9.0: dotnet8.0: .NET Information Disclosure Vulnerability (CVE-2026-58649) * dotnet10.0: dotnet9.0: .NET Elevation of Privilege Vulnerability (CVE-2026-69806) * dotnet10.0: dotnet9.0: dotnet: dotnet8.0: .NET Denial of Service Vulnerability (CVE-2026-58280) * dotnet10.0: dotnet8.0: dotnet9.0: dotnet: .NET Information Disclosure Vulnerability (CVE-2026-66822) * dotnet9.0: dotnet: dotnet10.0: dotnet8.0: .NET Denial of Service Vulnerability (CVE-2026-69651) * dotnet8.0: dotnet10.0: dotnet: dotnet9.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-70159) * dotnet10.0: dotnet8.0: dotnet9.0: ASP.NET Core Elevation of Privilege Vulnerability (CVE-2026-70175) * dotnet10.0: dotnet8.0: dotnet9.0: ASP.NET Core Elevation of Privilege Vulnerability (CVE-2026-70179) * dotnet9.0: dotnet8.0: dotnet10.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-70181) * dotnet: dotnet10.0: dotnet9.0: dotnet8.0: ASP.NET Core Elevation of Privilege Vulnerability (CVE-2026-70183) * dotnet10.0: dotnet9.0: dotnet8.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-70186) * dotnet: ASP.NET Core Security Feature Bypass Vulnerability (CVE-2026-70188) * dotnet9.0: dotnet8.0: dotnet10.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-70196) * dotnet: ASP.NET Core Tampering Vulnerability (CVE-2026-88092) * dotnet10.0: dotnet8.0: dotnet9.0: dotnet: MessagePack: Nested arrays can blow past buffer length limits (CVE-2026-92707) * dotnet: dotnet8.0: dotnet9.0: dotnet10.0: .NET Elevation of Privilege Vulnerability (CVE-2026-96225) * dotnet9.0: dotnet10.0: dotnet8.0: dotnet: ASP.NET Core Remote Code Execution Vulnerability (CVE-2026-96230) * dotnet: dotnet9.0: dotnet10.0: dotnet8.0: .NET Elevation of Privilege Vulnerability (CVE-2026-96231) * dotnet10.0: dotnet: dotnet8.0: dotnet9.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-96233) * dotnet: dotnet10.0: dotnet9.0: dotnet8.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-96236) * dotnet8.0: dotnet10.0: dotnet9.0: .NET Remote Code Execution Vulnerability (CVE-2026-96237) * dotnet8.0: dotnet10.0: dotnet9.0: dotnet: .NET Security Feature Bypass Vulnerability (CVE-2026-96238) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
- access.redhat.com/errata/RHSA-2026:88424 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2528870 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2528921 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548778 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548781 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548784 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548786 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548787 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548790 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548791 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548792 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548793 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548796 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548798 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548799 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548800 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548803 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548804 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2548805 (opens in a new tab)