CVE-2026-88092CWE-444

CVE-2026-88092

Critical · published October 13, 2026

CVSS v3.1
9.4
EPSS
1%
Percentile
55.6
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.4 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00786 · 55.6th percentile
Weakness
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published
2026-10-13T23:21Z
Affected products (7)
ProductVersionsFixed in
microsoft/asp.net_core≥ 8.0.0, < 8.0.328.0.32
microsoft/asp.net_core≥ 9.0.0, < 9.0.219.0.21
microsoft/asp.net_core≥ 10.0.0, < 10.0.1310.0.13
microsoft/asp.net_core> 11.0.0—
microsoft/asp.net_coreall versions—
microsoft/visual_studio_2022≥ 17.14.0, < 17.14.4217.14.42
microsoft/visual_studio_2026≥ 18.10.0, < 18.10.418.10.4
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88092 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:35Z
    EPSS moved — → 1%
    epss
  • 13 OCT 19:01Z
    ASP.NET Core Tampering Vulnerability
    cvelistv5
  • 13 OCT 19:01Z
    ASP.NET Core Tampering Vulnerability
    cvelistv5