CVE-2026-42899: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') in Microsoft .NET 10.0
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
AI Analysis
Technical Summary
CVE-2026-42899 is a vulnerability classified under CWE-835 (Loop with Unreachable Exit Condition) affecting ASP.NET Core in Microsoft .NET 10.0. The flaw allows an unauthenticated remote attacker to cause a denial of service by triggering an infinite loop, leading to application crashes and excessive consumption of CPU and memory resources. The vulnerability has a CVSS 3.1 base score of 7.5 (high severity) with network attack vector, low attack complexity, no privileges or user interaction required, and impacts availability only. Microsoft has released an official fix for this issue.
Potential Impact
The vulnerability enables unauthenticated remote attackers to cause denial of service by triggering an infinite loop in ASP.NET Core, resulting in application crashes and high CPU and memory consumption. This can degrade service availability and potentially disrupt dependent applications or services.
Mitigation Recommendations
An official fix is available from Microsoft and should be applied as soon as possible. No practical mitigations other than patching have been identified. Users are advised to update affected .NET 10.0 packages promptly to remediate this vulnerability.
CVE-2026-42899: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') in Microsoft .NET 10.0
Description
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
.NET 10.0
Microsoft
.NET 8.0
Microsoft
.NET 9.0
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42899 is a vulnerability classified under CWE-835 (Loop with Unreachable Exit Condition) affecting ASP.NET Core in Microsoft .NET 10.0. The flaw allows an unauthenticated remote attacker to cause a denial of service by triggering an infinite loop, leading to application crashes and excessive consumption of CPU and memory resources. The vulnerability has a CVSS 3.1 base score of 7.5 (high severity) with network attack vector, low attack complexity, no privileges or user interaction required, and impacts availability only. Microsoft has released an official fix for this issue.
Potential Impact
The vulnerability enables unauthenticated remote attackers to cause denial of service by triggering an infinite loop in ASP.NET Core, resulting in application crashes and high CPU and memory consumption. This can degrade service availability and potentially disrupt dependent applications or services.
Mitigation Recommendations
An official fix is available from Microsoft and should be applied as soon as possible. No practical mitigations other than patching have been identified. Users are advised to update affected .NET 10.0 packages promptly to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T22:35:54.967Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899","vendor":"Microsoft"}]
Threat ID: 6a036564cbff5d861008cca2
Added to database: 05/12/2026, 17:37:40 UTC
Last enriched: 08/11/2026, 16:57:57 UTC
Last updated: 09/11/2026, 07:31:53 UTC
Views: 95
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