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CVE-2026-118748

CVE-2026-118748

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

GHSA-5h82-77p6-2wp3 ↗EUVD-2026-122254 ↗

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.7.26381.103, <= 11.0.0-rc.3.26522.148
fixed in 11.0.0
CWE-770 Allocation of Resources Without Limits or Throttling
ETK-2026-4117Zero'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
cvss7.5cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
9h 00msince last run
17mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = cve.org publication
trigger signal (cve.org) +0hwaiting for further signals+5h35m
0
+2h
+4h
+8h
+10h
+12h

description

Affected ASP.NET Core 11 preview and release-candidate runtimes can retain untrusted field names indefinitely during Blazor static SSR client validation. An unauthenticated remote attacker may cause process memory exhaustion and disrupt the application when the affected validation path is reachable.

mitigation

Update affected ASP.NET Core runtime packages to version 11.0.0 and restart applications. Rebuild and redeploy self-contained applications so their bundled 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
17m
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-2026-118748

{
  "etk_id": "ETK-2026-4117",
  "cve_id": "CVE-2026-118748",
  "display_id": "CVE-2026-118748",
  "ghsa_id": "GHSA-5h82-77p6-2wp3",
  "euvd_id": "EUVD-2026-122254",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unbounded cache growth in ASP.NET Core Blazor static SSR validation",
  "summary": "Affected ASP.NET Core 11 preview and release-candidate runtimes can retain untrusted field names indefinitely during Blazor static SSR client validation. An unauthenticated remote attacker may cause process memory exhaustion and disrupt the application when the affected validation path is reachable.",
  "mitigation": "Update affected ASP.NET Core runtime packages to version 11.0.0 and restart applications. Rebuild and redeploy self-contained applications so their bundled runtime is updated.",
  "vendor": "nuget",
  "product": "nuget:Microsoft.AspNetCore.App.Runtime.linux-arm",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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-preview.7.26381.103, <= 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"
    }
  ],
  "cwes": [
    770
  ],
  "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": 17.1321498,
  "t0_at": "2026-11-10T18:21:52.687000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-10T18:21:52.687000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-10T18:21:52.687000+00:00",
      "url": "https://github.com/dotnet/aspnetcore/security/advisories/GHSA-5h82-77p6-2wp3"
    }
  }
}

published 2026-11-10 23:39Z
last change 2026-11-11 06:19Z

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