What is CVE-2026-88092?

CVE-2026-88092 is a critical-severity vulnerability in Microsoft Asp.net Core 10.0, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 9.4/10. Published 2026-10-13.

How severe is CVE-2026-88092?

Critical severity. CVSS v3 base score is 9.4 out of 10.

Vulnerability in Microsoft Asp.net Core 10.0

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.

Vulnerability class: HTTP Request Smuggling

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-444 — Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)

References

ASP.NET Core Tampering Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-88092?: CVE-2026-88092 is a critical-severity vulnerability in Microsoft Asp.net Core 10.0, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 9.4/10. Published 2026-10-13.
How severe is CVE-2026-88092?: Critical severity. CVSS v3 base score is 9.4 out of 10.