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CVE-2026-62899VulnerabilityPublished Updated

Red Hat Security Advisory: .NET 10.0 security, bug fix, and enhancement update

Affects Red Hat .NET 10.0Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-62899· Medium 5.9

Not known to be exploited · CVSS 5.9 Medium · fixed in Red Hat package updates : update Red Hat microsoft.netcore.app when convenient.

Data as of 30 Oct 2026, 06:44 UTC

CVSS 3.1 base score
5.9Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (microsoft)CVSS 3.15.9
Patch
Available – fixed in 10.0.11, 8.0.30, 9.0.19 +2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 29 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Microsoft.NET 10.0 runtimeAffected
  • >=10.0.0 <10.0.11
Fixed in
  • 10.0.11
Microsoft.NET 8.0 runtimeAffected
  • >=8.0.0 <8.0.30
Fixed in
  • 8.0.30
Microsoft.NET 9.0 runtimeAffected
  • >=9.0.0 <9.0.19
Fixed in
  • 9.0.19
MicrosoftMicrosoft Visual Studio 2022 version 17.14Affected
  • >=17.14.0 <17.14.38
Fixed in
  • 17.14.38
MicrosoftMicrosoft Visual Studio 2026 version 18.8Affected
  • >=18.0 <18.8.3
Fixed in
  • 18.8.3
NuGetmicrosoft.netcore.apppkg:nuget/microsoft.netcore.appOther threatsAffected
  • =10.0.0
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: 10.0.111 Runtime version: 10.0.11 Security Fix(es): * .NET: .NET Core: .NET Security Feature Bypass Vulnerability (CVE-2026-62899) * .NET: .NET Information Disclosure Vulnerability (CVE-2026-62900) * .NET: .NET Denial of Service Vulnerability (CVE-2026-62901) * .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909) Bug Fix(es) and Enhancement(s): * Update .NET 10.0 to SDK 10.0.111 and Runtime 10.0.11 [rhel-10.2.z] (JIRA:RHEL-235482) 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

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