.net sdk vulnerabilities and fixes

Recent CVEs affecting .net sdk, with upgrade or downgrade steps. 1 tracked.

Also searched as: net sdk, .netsdk, net sdk.

.net sdk has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-09-08. Highest priority: CVE-2026-58649 (score 35/100).

• CVE-2026-58649 MEDIUM 6.5 DOWNGRADE UPGRADE Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.

FAQ

How do I fix .net sdk vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is .net sdk being exploited right now?

None of the tracked .net sdk CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which .net sdk CVE should I patch first?

CVE-2026-58649 currently ranks highest (35/100): Origin validation error in .NET allows an unauthorized attacker to disclose information over a network..

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