CVE-2026-42899: Microsoft .net

High severity, CVSS 7.5. EPSS: 2.4% chance of exploitation in the next 30 days.

Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Affected products

• Microsoft .net: from 8.0.0, before 8.0.27 (fixed in 8.0.27); from 9.0.0, before 9.0.16 (fixed in 9.0.16); from 10.0.0, before 10.0.8 (fixed in 10.0.8)

Published 2026-05-12. Last modified 2026-07-15.