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CVE-2023-45288

HTTP/2 CONTINUATION flood in net/http

An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request's headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.

CVSS 3.1 · 7.5 High EPSS 89.5% KEV · Not listed
Vendors
Go Standard Library Golang Redhat
Products
Net\/http Http2 Acm and 30 more
CVE-2024-24791

Denial of service due to improper 100-continue handling in net/http

The net/http HTTP/1.1 client mishandled the case where a server responds to a request with an "Expect: 100-continue" header with a non-informational (200 or higher) status. This mishandling could leave a client connection in an invalid state, where the next request sent on the connection will fail. An attacker sending a request to a net/http/httputil.ReverseProxy proxy can exploit this mishandling to cause a denial of service by sending "Expect: 100-continue" requests which elicit a non-informational response from the backend. Each such request leaves the proxy with an invalid connection, and causes one subsequent request using that connection to fail.

CVSS 3.1 · 7.5 High EPSS 1.4% KEV · Not listed
Vendors
Go Standard Library Redhat
Products
Net\/http Amq Streams Ceph Storage and 17 more
CVE-2025-47910

CrossOriginProtection insecure bypass patterns not limited to exact matches in net/http

When using http.CrossOriginProtection, the AddInsecureBypassPattern method can unexpectedly bypass more requests than intended. CrossOriginProtection then skips validation, but forwards the original request path, which may be served by a different handler without the intended security protections.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Go Standard Library Golang
Products
Net\/http Http2 Net