CVE-2026-70188
waiting for further signalsZero needs more public information before it can validate it.GHSA-fpq8-4vhr-rcxx ↗EUVD-2026-99700 ↗
no check availablenot proven exploitable
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
nuget:Microsoft.AspNetCore.App.Runtime.linux-arm >= 11.0.0-preview.1, <= 11.0.0-rc.1; >= 8.0.0, <= 8.0.31; >= 10.0.0, <= 10.0.12; >= 9.0.0, <= 9.0.20
fixed in 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21
ETK-2026-1509Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm
pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64
pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm
pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm64
pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-x64
pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-x64
pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-arm64
pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-x64
pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-arm64
pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x64
pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x86
7d 07h 19msince last run
31mAI analysisAnalysis: how long the AI spent reversing this signal.
description
Affected ASP.NET Core runtime packages contain a Kestrel HTTP/2 parsing flaw that can cause intermediaries and the application to interpret a request differently. A remote unauthenticated attacker may bypass security controls when an affected application exposes an HTTP/2 endpoint.
mitigation
Update affected runtime packages to 8.0.32, 9.0.21, 10.0.13, or 11.0.0-rc.2, as appropriate for the release line. Until updates are deployed, restrict or disable HTTP/2 exposure on affected Kestrel endpoints where operationally feasible.
fixed in 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21
check
no
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.83%56th percentile
agent run time
31m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-13 19:00Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–
outcome
Contextual: an exploit technique exists, but no deterministic check could cover this one.
source signals
Public signals that triggered or updated the pipeline. These are inputs for the deltas above.
- 2026-10-13 19:00Zghsa: trigger signal, started the run
- 2026-10-13 19:00Zcve.org record for CVE-2026-70188
this entry in the feed
GET /api/v1/feed/CVE-2026-70188
{ "etk_id": "ETK-2026-1509", "cve_id": "CVE-2026-70188", "display_id": "CVE-2026-70188", "ghsa_id": "GHSA-fpq8-4vhr-rcxx", "euvd_id": "EUVD-2026-99700", "status": "published", "anchor_state": "anchored", "title": "HTTP request smuggling in ASP.NET Core Kestrel", "summary": "Affected ASP.NET Core runtime packages contain a Kestrel HTTP/2 parsing flaw that can cause intermediaries and the application to interpret a request differently. A remote unauthenticated attacker may bypass security controls when an affected application exposes an HTTP/2 endpoint.", "mitigation": "Update affected runtime packages to 8.0.32, 9.0.21, 10.0.13, or 11.0.0-rc.2, as appropriate for the release line. Until updates are deployed, restrict or disable HTTP/2 exposure on affected Kestrel endpoints where operationally feasible.", "vendor": "nuget", "product": "nuget:Microsoft.AspNetCore.App.Runtime.linux-arm", "affected": [ { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-arm", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-musl-arm", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-musl-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-musl-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.osx-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.osx-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.win-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.win-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.AspNetCore.App.Runtime.win-x86", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x86" }, { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-arm", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm" }, { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-musl-arm", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm" }, { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-musl-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-musl-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": 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"10.0.13" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-musl-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-musl-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.AspNetCore.App.Runtime.osx-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.AspNetCore.App.Runtime.osx-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.AspNetCore.App.Runtime.win-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.AspNetCore.App.Runtime.win-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.AspNetCore.App.Runtime.win-x86", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x86" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 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"affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-musl-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.AspNetCore.App.Runtime.linux-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.AspNetCore.App.Runtime.osx-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.AspNetCore.App.Runtime.osx-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.AspNetCore.App.Runtime.win-arm64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.AspNetCore.App.Runtime.win-x64", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.AspNetCore.App.Runtime.win-x86", "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x86" } ], "cwes": null, "cvss_score": 9.1, "cvss_src": "cna_vendor", "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "epss_score": 0.0083, "epss_percentile": 0.568, "epss_asof": "2026-10-20", "automation": "contextual", "check": false, "check_confidence_basis": null, "exploit": false, "pipeline_minutes": 30.65043875, "t0_at": "2026-10-13T19:00:26.806000+00:00", "signals": { "trigger_signal": { "at": "2026-10-13T19:00:26.806000+00:00", "days": 0, "is_lower_bound": false, "measured_at": "2026-10-13T19:00:26.806000+00:00", "url": "https://github.com/advisories/GHSA-fpq8-4vhr-rcxx" } } }
published 2026-10-13 21:55Z
last change 2026-10-21 05:31Z
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