Vulnerabilities
CVE-2026-70188: ASP.NET Core Security Feature Bypass – Update Table Clarification
Microsoft updated its security updates table to add KB article links for ASP.NET Core 11.0 and Visual Studio. The vulnerability was already fixed; no new patches are required. Defenders should verify that their ASP.NET Core 11.0 deployments are up‑to‑date and review the KB articles for guidance.
What Happened
Microsoft identified a security feature bypass in ASP.NET Core 11.0, designated CVE‑2026‑70188. The issue was addressed in earlier updates; the latest table update only adds links.
Impact
The vulnerability could allow an attacker to bypass authentication or authorization checks in ASP.NET Core 11.0 applications. No new exploits have been reported; the fix remains in place.
What to Do
- Confirm that your ASP.NET Core 11.0 installations have the latest security updates (KBxxxxxx).
- Review the KB article linked in the updated table for detailed guidance.
- Monitor for any new advisories related to ASP.NET Core.
Additional Resources
Microsoft Security Advisory: CVE‑2026‑70188
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