{"id":"CVE-2026-88092","title":"Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.","summary":"Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.","severity":"critical","cvss":9.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","cwe":["CWE-444"],"vendor":"microsoft","product":"asp.net_core","affected":["asp.net_core >= 8.0.0, < 8.0.32","asp.net_core >= 9.0.0, < 9.0.21","asp.net_core >= 10.0.0, < 10.0.13","asp.net_core > 11.0.0","asp.net_core = 11.0","visual_studio_2022 >= 17.14.0, < 17.14.42","visual_studio_2026 >= 18.10.0, < 18.10.4"],"patched":["asp.net_core 10.0.13","visual_studio_2022 17.14.42","visual_studio_2026 18.10.4"],"published":"2026-10-13","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:47:14.833","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88092","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88092","label":"secure@microsoft.com"},{"url":"https://github.com/dotnet/aspnetcore/security/advisories/GHSA-rv87-ccxw-8ggf"},{"url":"https://github.com/dotnet/announcements/issues/472"},{"url":"https://github.com/advisories/GHSA-rv87-ccxw-8ggf"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88092.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-88092"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88092"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88092"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2548799"},{"url":"https://access.redhat.com/errata/RHSA-2026:86195"},{"url":"https://access.redhat.com/errata/RHSA-2026:86168"},{"url":"https://access.redhat.com/errata/RHSA-2026:86172"},{"url":"https://access.redhat.com/errata/RHSA-2026:86192"},{"url":"https://access.redhat.com/errata/RHSA-2026:86594"},{"url":"https://access.redhat.com/errata/RHSA-2026:86170"},{"url":"https://access.redhat.com/errata/RHSA-2026:86193"},{"url":"https://access.redhat.com/errata/RHSA-2026:86169"},{"url":"https://access.redhat.com/errata/RHSA-2026:86171"},{"url":"https://access.redhat.com/errata/RHSA-2026:88474"},{"url":"https://access.redhat.com/errata/RHSA-2026:88424"},{"url":"https://access.redhat.com/errata/RHSA-2026:88425"},{"url":"https://access.redhat.com/errata/RHSA-2026:88422"}],"tags":["nvd","ghsa","nuget","cve.org","csaf","vex","red-hat"],"epss":0.00934,"epssPercentile":0.60573,"aliases":["GHSA-rv87-ccxw-8ggf"],"ecosystem":"nuget","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-08T00:00:00+00:00"},"ingestedAt":"2026-10-13T19:43:29.209Z","slug":"CVE-2026-88092","body":"## Overview\n\nInconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.\n\n## Affected\n\n- `asp.net_core >= 8.0.0, < 8.0.32`\n- `asp.net_core >= 9.0.0, < 9.0.21`\n- `asp.net_core >= 10.0.0, < 10.0.13`\n- `asp.net_core > 11.0.0`\n- `asp.net_core = 11.0`\n- `visual_studio_2022 >= 17.14.0, < 17.14.42`\n- `visual_studio_2026 >= 18.10.0, < 18.10.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `asp.net_core 10.0.13`\n- `visual_studio_2022 17.14.42`\n- `visual_studio_2026 18.10.4`\n\n## Package advisory (CVE-2026-88092)\n\nAffected packages:\n\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 9.0.0, <= 9.0.20`\n\nPatched in:\n\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 11.0.0-rc.2`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 9.0.21`\n\nSource: https://github.com/advisories/GHSA-rv87-ccxw-8ggf\n\n## Vendor advisories\n\n- **Red Hat VEX** · Critical · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88092.json)\n- **RHSA-2026:86195** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86195)\n- **RHSA-2026:86168** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86168)\n- **RHSA-2026:86172** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86172)\n- **RHSA-2026:86192** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86192)\n- **RHSA-2026:86594** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:86594)\n- **RHSA-2026:86170** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86170)\n- **RHSA-2026:86193** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86193)\n- **RHSA-2026:86169** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86169)\n- **RHSA-2026:86171** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86171)\n- **RHSA-2026:88474** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:88474)\n- **RHSA-2026:88424** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:88424)\n- **RHSA-2026:88425** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:88425)\n- **RHSA-2026:88422** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:88422)","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":51.7,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}