CVE-2026-118747

.NET Denial of Service Vulnerability

Published Nov 10, 2026 CVSS 3.1 · 7.5 High EPSS 1.3% KEV · Not listed
Description
Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-vmv3-wvjp-wqpj Microsoft Security Advisory CVE-2026-118747 - .NET Denial of Service Vulnerability
History
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.
Title .NET Denial of Service Vulnerability
First Time appeared Microsoft
Microsoft system.formats.cbor
Weaknesses CWE-407
CPEs cpe:2.3:a:microsoft:system.formats.cbor:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft system.formats.cbor
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 13, 2026, 6:10 PM
Reserved
Oct 28, 2026, 7:08 PM
Status
Awaiting Analysis
Published
Nov 10, 2026, 7:19 PM
Modified
Nov 11, 2026, 12:17 AM