EUVD-2026-73741
GHSA-8cp2-47hg-mfgh
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Network delivery, no auth required, AC:H reflects configuration-dependent decompression middleware; impact is availability-only with no confidentiality or integrity effect.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
6DescriptionCVE.org
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
AnalysisAI
Decompression bomb (CWE-409) in ASP.NET Core allows unauthenticated remote attackers to exhaust server resources and deny service by submitting highly compressed HTTP payloads that expand disproportionately during server-side processing. Affected releases span .NET 8.0, 9.0, and 10.0 runtimes, all corresponding ASP.NET Core versions, and Visual Studio 2022/2026 which embed affected runtimes. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target application runs a vulnerable ASP.NET Core version (8.0.0-8.0.30, 9.0.0-9.0.19, 10.0.0-10.0.11, or 11.0 pre-RC1) and has decompression middleware or request-body decompression handlers active in its pipeline - the CVSS AC:H metric explicitly signals this configuration dependency. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS score of 5.9 (Medium) reflects the AC:H qualifier, indicating that exploitation depends on the target application having decompression middleware or specific request-handling paths active - not all ASP.NET Core deployments expose this surface by default. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to the patched releases: .NET and ASP.NET Core 8.0.31, 9.0.20, or 10.0.12 as appropriate for your channel, or ASP.NET Core 11.0 RC1 for pre-release deployments. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Same technique Denial Of Service
View allShare
External POC / Exploit Code
Leaving vuln.today