CVE-2026-88092

Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.

Red Hat has evaluated this vulnerability as having a Critical impact because it allows remote, unauthenticated attackers to execute HTTP request smuggling attacks without requiring user interaction or specialized privileges. ASP.NET Core web applications deployed across Red Hat platforms using Kestrel to process HTTP/1 requests are susceptible if aborted connections lead to desynchronized request boundaries. Exploitation of this desynchronization can result in severe integrity and confidentiality impacts, such as request tampering, credential exposure, or proxy filter evasion.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.