CVE-2026-58649
Medium
Description
Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Microsoft .net
PublishedSep 8, 2026
First seenSep 8, 2026
Weakness typeCWE-346CWE-346
How to fix
Update
- microsoft .net_sdk8.0.130, 8.0.424, 9.0.120, 9.0.317, 10.0.111, 10.0.400 or later
- microsoft visual_studio_202217.14.40 or later
- microsoft visual_studio_202618.9.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft .net | 11.0.0 | — |
| microsoft .net_sdk | 8.0.100 ≤ v < 8.0.130, 8.0.200 ≤ v < 8.0.424, 9.0.100 ≤ v < 9.0.120, 9.0.200 ≤ v < 9.0.317, 10.0.100 ≤ v < 10.0.111, 10.0.200 ≤ v < 10.0.400 | 8.0.130, 8.0.424, 9.0.120, 9.0.317, 10.0.111, 10.0.400 |
| microsoft visual_studio_2022 | 17.14.0 ≤ v < 17.14.40 | 17.14.40 |
| microsoft visual_studio_2026 | 18.9.0 ≤ v < 18.9.3 | 18.9.3 |
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