CVE-2026-69304
mediumImproper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Vendor / product: Microsoft — asp.net core
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CVSS
5.9
5.9 (CVSS v3.1)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-09-08 18:18
Modified: 2026-09-30 20:49
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 06:51 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
microsoft / asp.net_core ≥8.0.0 <8.0.28, ≥9.0.0 <9.0.17, ≥10.0.0 <10.0.9, >11.0.0, 11.0
microsoft / visual_studio_2022 ≥17.14.0 <17.14.40
microsoft / visual_studio_2026 ≥18.9.0 <18.9.3
microsoft / .net ≥8.0.0 <8.0.31, ≥9.0.0 <9.0.20, ≥10.0.0 <10.0.12
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:51 UTC · record ↗