net/http: Sensitive headers not cleared on cross-origin redirect in net/http

A flaw was found in net/http. Handling Proxy-Authorization and Proxy-Authenticate headers during cross-origin redirects allows these headers to be inadvertently forwarded, potentially exposing sensitive authentication credentials. This flaw allows a network-based attacker to manipulate redirect...

net/http: Sensitive headers not cleared on cross-origin redirect in net/http

A flaw was found in net/http. Handling Proxy-Authorization and Proxy-Authenticate headers during cross-origin redirects allows these headers to be inadvertently forwarded, potentially exposing sensitive authentication credentials. This flaw allows a network-based attacker to manipulate redirect...

curl: CURLOPT_PROXYHEADER is not part of the HTTP-proxy connection reuse key: a second CONNECT-tunnel transfer silently reuses the first tunnel's Proxy-Auth

Summary When libcurl tunnels through an HTTP proxy with CONNECT HTTPS-over-proxy, the custom headers set via CURLOPTPROXYHEADER are sent to the proxy once, at tunnel-setup time lib/httpproxy.c:63-83. The connection-reuse decision for a proxied connection, however, does not take proxyheaders into...

POC-CVE-2023-32681

POC for CVE-2023-32681 This is a Python 3 implementation of CVE-2023-32681, affecting clients using the requests version = 2.30.0. As per https://www.rfc-editor.org/rfc/rfc9110.htmlsection-15.4 whenever redirection 3xx is issued by the server then user-agent should modify the request to remove...

GHSA-CR65-55V9-XHVV Dio: Cross-origin redirect leaks sensitive request headers in `dio_http2_adapter`

Summary diohttp2adapter follows HTTP Location redirects without stripping sensitive request headers when the redirect target is a different origin. An attacker who can cause any origin server to return a cross-origin 302 redirect receives the victim's Authorization, Cookie, and Proxy-Authorizatio...

Dio: Cross-origin redirect leaks sensitive request headers in `dio_http2_adapter`

Summary diohttp2adapter follows HTTP Location redirects without stripping sensitive request headers when the redirect target is a different origin. An attacker who can cause any origin server to return a cross-origin 302 redirect receives the victim's Authorization, Cookie, and Proxy-Authorizatio...

Microsoft Security Advisory CVE-2026-66822 - .NET and Visual Studio Information Disclosure Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in System.Net.Http. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. SocketsHttpHandler can retain a...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an...

GHSA-WXXW-5CVC-53J7 Microsoft Security Advisory CVE-2026-66822 - .NET and Visual Studio Information Disclosure Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in System.Net.Http. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. SocketsHttpHandler can retain a...