CVE-2026-88092 · GHSA-rv87-ccxw-8ggf
Microsoft Security Advisory CVE-2026-88092 - ASP.NET Core Security Feature Bypass Vulnerability
- Risk score
- 82/100
- CVSS
- 9.4 v3.1
- Exploit chance (30 days)
- 0.8%
- Published
- 13 Oct 2026
Open in the live forecast Today's forecast
What to know
- 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.
- Affected
- Microsoft.AspNetCore.App.Runtime.linux-arm (nuget) >= 8.0.0, <= 8.0.31; Microsoft.AspNetCore.App.Runtime.linux-arm64 (nuget) >= 8.0.0, <= 8.0.31; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (nuget) >= 8.0.0, <= 8.0.31; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (nuget) >= 8.0.0, <= 8.0.31
- Fix
- Upgrade Microsoft.AspNetCore.App.Runtime.linux-arm to 8.0.32; Microsoft.AspNetCore.App.Runtime.linux-arm64 to 8.0.32; Microsoft.AspNetCore.App.Runtime.linux-musl-arm to 8.0.32; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 to 8.0.32; Microsoft.AspNetCore.App.Runtime.linux-musl-x64 to 8.0.32; Mi…
- Exploitation
- No known exploitation
Why it is Red
- CVSS 9.4 critical
- Remotely exploitable without logging in
- On your watchlist: asp.net core, NuGet
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| Microsoft.AspNetCore.App.Runtime.linux-arm | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.linux-arm64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.linux-x64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.osx-arm64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.osx-x64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.win-arm64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.win-x64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.win-x86 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.AspNetCore.App.Runtime.linux-arm | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
References
- https://github.com/advisories/GHSA-rv87-ccxw-8ggf
- https://github.com/dotnet/aspnetcore/security/advisories/GHSA-rv87-ccxw-8ggf
- https://github.com/dotnet/announcements/issues/472
- https://nvd.nist.gov/vuln/detail/CVE-2026-88092
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88092
- https://github.com/advisories/GHSA-rv87-ccxw-8ggf
Original description
Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.
Last activity 13 Oct 2026. Patch Forecast updates every hour.