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CVE-2026-118749

CVE-2026-118749

waiting for further signalsZero needs more public information before it can validate it.

GHSA-m28h-pj36-4364 ↗EUVD-2026-122255 ↗

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-rc.1.26425.128, <= 11.0.0-rc.3.26522.148
fixed in 11.0.0
CWE-407 Inefficient Algorithmic Complexity
ETK-2026-4110Zero'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
pkg:nuget/Microsoft.Extensions.Validation
cvss7.5cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
9h 34msince last run
13mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = cve.org publication
trigger signal (cve.org) +0hwaiting for further signals+5h01m
0
+2h
+4h
+6h
+8h
+10h
+12h

description

ASP.NET Core Minimal API validation in affected .NET 11 release-candidate runtime packages and Microsoft.Extensions.Validation can consume disproportionate CPU while handling crafted validation input. An unauthenticated remote attacker can use this behavior to degrade application availability. Exploitation requires an exposed Minimal API endpoint that performs the affected validation.

mitigation

Upgrade the applicable ASP.NET Core runtime or Microsoft.Extensions.Validation package to 11.0.0, then restart affected applications. Rebuild and redeploy self-contained applications so their embedded runtime is updated.

fixed in 11.0.0

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.
–
agent run time
13m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-11-10 18:21Z
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, not validated: no deterministic check could cover this one, and no technique passed our review.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-11-10 18:21Z
  2. 2026-11-10 18:21Z

this entry in the feed

GET /api/v1/feed/CVE-2026-118749

{
  "etk_id": "ETK-2026-4110",
  "cve_id": "CVE-2026-118749",
  "display_id": "CVE-2026-118749",
  "ghsa_id": "GHSA-m28h-pj36-4364",
  "euvd_id": "EUVD-2026-122255",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Algorithmic denial of service in ASP.NET Core Minimal API validation",
  "summary": "ASP.NET Core Minimal API validation in affected .NET 11 release-candidate runtime packages and Microsoft.Extensions.Validation can consume disproportionate CPU while handling crafted validation input. An unauthenticated remote attacker can use this behavior to degrade application availability. Exploitation requires an exposed Minimal API endpoint that performs the affected validation.",
  "mitigation": "Upgrade the applicable ASP.NET Core runtime or Microsoft.Extensions.Validation package to 11.0.0, then restart affected applications. Rebuild and redeploy self-contained applications so their embedded runtime is updated.",
  "vendor": "nuget",
  "product": "nuget:Microsoft.AspNetCore.App.Runtime.linux-arm",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "package_name": "Microsoft.AspNetCore.App.Runtime.linux-arm",
      "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "package_name": "Microsoft.AspNetCore.App.Runtime.linux-arm64",
      "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "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-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "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-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "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-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "package_name": "Microsoft.AspNetCore.App.Runtime.linux-x64",
      "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-x64"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "package_name": "Microsoft.AspNetCore.App.Runtime.osx-arm64",
      "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-arm64"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "package_name": "Microsoft.AspNetCore.App.Runtime.osx-x64",
      "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-x64"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "package_name": "Microsoft.AspNetCore.App.Runtime.win-arm64",
      "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-arm64"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "package_name": "Microsoft.AspNetCore.App.Runtime.win-x64",
      "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x64"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "package_name": "Microsoft.AspNetCore.App.Runtime.win-x86",
      "purl": "pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x86"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-rc.1.26425.128, <= 11.0.0-rc.3.26522.148"
      ],
      "ecosystem": "nuget",
      "fixed_versions": [
        "11.0.0"
      ],
      "package_name": "Microsoft.Extensions.Validation",
      "purl": "pkg:nuget/Microsoft.Extensions.Validation"
    }
  ],
  "cwes": [
    407
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 13.230603383333333,
  "t0_at": "2026-11-10T18:21:53.138000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-10T18:21:53.138000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-10T18:21:53.138000+00:00",
      "url": "https://github.com/dotnet/aspnetcore/security/advisories/GHSA-m28h-pj36-4364"
    }
  }
}

published 2026-11-10 23:09Z
last change 2026-11-11 08:31Z

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