Vulnerability in Microsoft Asp.net Core

CVE-2026-69304

Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-69304: held from 0.009 to 0.009.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: -0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-69304?
CVE-2026-69304 is a medium-severity vulnerability in Microsoft Asp.net Core, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 5.9/10. Published 2026-09-08.
How severe is CVE-2026-69304?
Medium severity. CVSS v3 base score is 5.9 out of 10.