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CVE-2026-56170

ASP.NET Core Denial of Service Vulnerability

HIGH
7.5
CVSS Score
Published: July 14, 2026 at 05:05 PM UTC
Updated: October 28, 2026 at 08:18 PM UTC
4 products affected across 1 vendor.net.NET 9.0 runtime.NET 8.0 runtime· also runs on 3 platforms

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

.net· Microsoft
95%
10.0.0 ≤ v < 10.0.68.0.0 ≤ v < 8.0.299.0.0 ≤ v < 9.0.1810.0.08.0.09.0.0
Affected range stops below 10.0.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.0.29, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.18, so it looks safe — our inference, not a vendor statement
apple-macos (environment) · linux-linux-kernel (environment) · microsoft-windows (environment)
.NET 10.0 runtime· Microsoft
90%
.NET 8.0 runtime· Microsoft
90%
.NET 9.0 runtime· Microsoft
90%

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56170

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-770

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