CVE-2025-55315

Description

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.

How to fix CVE-2025-55315

To remediate CVE-2025-55315, upgrade the affected package to a fixed version below.

• Bitnami/aspnet-core—upgrade to 2.3.6 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 10.0.0-rc.2.25502.107 or later
• —upgrade to 2.3.6 or later

Is CVE-2025-55315 being exploited?

Low — EPSS is 1.7%, meaning exploitation activity has not been observed at scale.

Affected packages (14)

• >= 2.3.0, < 2.3.6, >= 8.0.0, < 8.0.21, >= 9.0.0, < 9.0.10
• >= 10.0.0-rc.1.25451.107, < 10.0.0-rc.2.25502.107
• >= 10.0.0-rc.1.25451.107, < 10.0.0-rc.2.25502.107
• >= 10.0.0-rc.1.25451.107, < 10.0.0-rc.2.25502.107
• >= 10.0.0-rc.1.25451.107, < 10.0.0-rc.2.25502.107
• >= 10.0.0-rc.1.25451.107, < 10.0.0-rc.2.25502.107
• >= 10.0.0-rc.1.25451.107, < 10.0.0-rc.2.25502.107
• >= 10.0.0-rc.1.25451.107, < 10.0.0-rc.2.25502.107

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-55315
• PATCHgithub.com/dotnet/aspnetcore
• WEBandrewlock.net/understanding-the-worst-dotnet-vulnerability-request-smuggling-and-cve-2025-55315/
• WEBgist.github.com/N3mes1s/d0897c13ca199e739ecc2b562f466040