Description
Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Published: 2026-07-14
Score: 7.5 High
EPSS: 1.0% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

ASP.NET Core can allocate resources without limits or throttling, which allows an unauthorized attacker to cause a denial of service across a network. The vulnerability is a classic case of uncontrolled resource consumption, identified as CWE-770. Resulting DoS can render the targeted web application unavailable to legitimate users.

Affected Systems

Microsoft .NET 8.0, 9.0, and 10.0 are impacted. These versions can be found on the Microsoft ".NET" platform and should be evaluated for deployment of any updates or patches. In addition, RedHat Hummingbird version 1 is affected and should receive its corresponding update.

Risk and Exploitability

The CVSS score of 7.5 indicates high severity, while the EPSS score of about 1% indicates a low exploitation probability at this time. The vulnerability is not listed in the CISA KEV catalog. The likely attack vector is network-based, where an attacker can send crafted requests to trigger excessive resource consumption.

Generated by OpenCVE AI on August 1, 2026 at 09:48 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the Microsoft vendor patch or upgrade to the latest .NET runtime version as outlined in the Microsoft advisory.
  • Configure application or network level throttling to limit resource allocation per request.
  • Monitor logs and performance metrics for abnormal consumption patterns that could indicate an attempted DoS attack.
  • Apply the RedHat Hummingbird update or upgrade to a patched version.

Generated by OpenCVE AI on August 1, 2026 at 09:48 UTC.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-j8gr-8fp3-5q5h Microsoft Security Advisory CVE-2026-56170 – .NET Denial of Service Vulnerability
History

Sat, 18 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat hummingbird
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics threat_severity

None

 threat_severity

Important

Tue, 14 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 14 Jul 2026 17:15:00 +0000

Type Values Removed Values Added
Description Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Title ASP.NET Core Denial of Service Vulnerability
First Time appeared Microsoft
Microsoft .net
Weaknesses CWE-770
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C'}

Subscriptions

Microsoft .net
Redhat Hummingbird
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-07-30T20:22:49.934Z

Reserved: 2026-06-19T13:53:31.989Z

Link: CVE-2026-56170

cve-icon Vulnrichment

Updated: 2026-07-14T17:49:28.275Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-07-14T17:05:13Z

Links: CVE-2026-56170 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-01T10:00:04Z

Weaknesses
  • CWE-770

    Allocation of Resources Without Limits or Throttling