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Microsoft Security Advisory CVE-2026-118747 - .NET Denial of Service Vulnerability

🗓️ 10 Nov 2026 23:20:27Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 3 Views

Colliding CBOR map keys in System.Formats.Cbor can hash-flood uniqueness checks for DoS.

Related
Detection
Refs
Vulners
Node
OR
system.formats.cborRange11.0.0-0–11.0.0nuget
system.formats.cborRange10.0.0-0–10.0.15nuget
system.formats.cborRange9.0.0-0–9.0.24nuget
system.formats.cborRange8.0.0-0–8.0.2nuget

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10 Nov 2026 23:20Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.17.5
3