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
This vulnerability (CVE-2026-42899) in Microsoft .NET 10.0 is caused by a loop with an unreachable exit condition (CWE-835) in ASP.NET Core, which can be exploited by an unauthorized attacker to induce an infinite loop, resulting in denial of service (DoS) over the network. The CVSS 3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Microsoft has released an official fix for this vulnerability. The vendor advisory is available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899.
Potential Impact
Exploitation of this vulnerability allows an unauthenticated attacker to cause a denial of service condition by triggering an infinite loop in ASP.NET Core applications running on .NET 10.0. This impacts the availability of the affected system but does not affect confidentiality or integrity.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the provided patch to .NET 10.0 as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899 to remediate the issue.
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
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-42899) in Microsoft .NET 10.0 is caused by a loop with an unreachable exit condition (CWE-835) in ASP.NET Core, which can be exploited by an unauthorized attacker to induce an infinite loop, resulting in denial of service (DoS) over the network. The CVSS 3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Microsoft has released an official fix for this vulnerability. The vendor advisory is available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899.
Potential Impact
Exploitation of this vulnerability allows an unauthenticated attacker to cause a denial of service condition by triggering an infinite loop in ASP.NET Core applications running on .NET 10.0. This impacts the availability of the affected system but does not affect confidentiality or integrity.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the provided patch to .NET 10.0 as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899 to remediate the issue.
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: 07/15/2026, 09:17:34 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 72
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.