ASP.NET Security Feature Bypass Vulnerability

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2025-55315 · Microsoft / collected KEV context

EUVD-2025-34426

GHSA-5rrx-jjjq-q2r5

BIT-aspnet-core-2025-55315

cve-program · CVE-2025-55315

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315

euvd · EUVD-2025-34426

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315

nvd · CVE-2025-55315

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315
• https://andrewlock.net/understanding-the-worst-dotnet-vulnerability-request-smuggling-and-cve-2025-55315/
• https://gist.github.com/N3mes1s/d0897c13ca199e739ecc2b562f466040

osv · GHSA-5rrx-jjjq-q2r5

• https://github.com/dotnet/aspnetcore/security/advisories/GHSA-5rrx-jjjq-q2r5
• https://nvd.nist.gov/vuln/detail/CVE-2025-55315
• https://github.com/dotnet/announcements/issues/371
• https://github.com/dotnet/aspnetcore
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315

• Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network. · Advisory content revised · 9 Nov 2026