PYSEC-2026-1434 Request smuggling leading to endpoint restriction bypass in Gunicorn

Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling HRS vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn's handli...

Security Bulletin: IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM Cloud Pak for Applications, are affected by HTTP request smuggling (CVE-2026-11541)

Summary IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM Cloud Pak for Applications, are affected by remote code execution and HTTP request smuggling. Vulnerability Details Refer to the security bulletins listed in the Remediation/Fixes section...

Security Bulletin: IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM Enterprise Application Runtimes, are affected by HTTP request smuggling (CVE-2026-11541)

Summary IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM Enterprise Application Runtimes, are affected by remote code execution and HTTP request smuggling. Vulnerability Details Refer to the security bulletins listed in the Remediation/Fixes...

Security Bulletin: IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM WebSphere Hybrid Edition, are affected by HTTP request smuggling (CVE-2026-11541)

Summary IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM WebSphere Hybrid Edition, are affected by remote code execution and HTTP request smuggling. Vulnerability Details Refer to the security bulletins listed in the Remediation/Fixes section...

Security Bulletin: IBM Tivoli Composite Application Manager for Application Diagnostics installed IBM WebSphere Application Server is affected by HTTP request smuggling and a denial of service.

Summary The security issue described in CVE-2026-9320 and CVE-2026-8646 has been identified in WebSphere Application Server included as part of IBM Tivoli Composite Application Manager for Application Diagnostics. Vulnerability Details Refer to the security bulletins listed in the Remediation/Fix...

Security Bulletin: IBM SPSS Modeler is affected by multiple vulnerabilities in DataView

Summary IBM SPSS Modeler is affected by multiple vulnerabilities in DataView. This has been addressed in the remediation section. Vulnerability Details CVEID:CVE-2019-16869 DESCRIPTION: Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers such as a "Transfer-Encoding :...

Siemens SENTRON 7KT PAC1261 HTTP Request/Response Smuggling (CVE-2025-22871)

The Go net/http package incorrectly treats a bare line feed LF as a valid line terminator in chunked transfer data. This flaw can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as a line terminator. This plugin only works with...

SUSE CVE-2026-38969

DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none...

Linux Distros Unpatched Vulnerability : CVE-2026-38969

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ruby webrick through v1.9.2 WEBrick reparses trailer Content-Length into canonical request state, enabling request smuggling. NOTE: the Supplier reports that Th...

nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

CVE-2026-38969

ruby webrick through v1.9.2 WEBrick reparses trailer Content-Length into canonical request state, enabling request smuggling. NOTE: the Supplier reports that "The project README states that it is suitable for testing and development, and that its developers do not encourage its use to serve...

Security Bulletin: IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM WebSphere Hybrid Edition, are affected by multiple vulnerabilities (CVE-2026-8646, CVE-2026-9320, CVE-2026-9071)

Summary IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM WebSphere Hybrid Edition, are affected by HTTP request smuggling and a denial of service. This affects IBM WebSphere Application Server Liberty with the servlet-3.0, servlet-3.1,...

Security Bulletin: IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM Cloud Pak for Applications, are affected by multiple vulnerabilities (CVE-2026-8646, CVE-2026-9320, CVE-2026-9071)

Summary IBM WebSphere Application Server and WebSphere Application Server Liberty, which are bundled with IBM Cloud Pak for Applications, are affected by HTTP request smuggling and a denial of service. This affects IBM WebSphere Application Server Liberty with the servlet-3.0, servlet-3.1,...

HTTP Request Smuggling

Overview webrick is a HTTP server toolkit that can be configured as an HTTPS server, a proxy server, and a virtual-host server. Affected versions of this package are vulnerable to HTTP Request Smuggling in the request process. An attacker can bypass request boundaries and interfere with HTTP...

CVE-2026-38969

Rejected reason: DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none...

DEBIAN-CVE-2026-38969

Bulletin has no description...

UBUNTU-CVE-2026-38969

Rejected reason: DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none...

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ruby webrick through v1.9.2 WEBrick reparses trailer Content-Length into canonical request state, enabling request smuggling. NOTE: the Supplier reports that "The project README states that it is suitable for testing and development, and that its developers do not encourage its use to serve...

USN-8495-1: nghttp2 vulnerability

It was discovered that the nghttp2 nghttpx proxy incorrectly handled HTTP/1.1 Upgrade requests that included a Content-Length header and body. A remote attacker could possibly use this issue to perform HTTP request and response smuggling attacks against backend services...

netty-codec-http: Netty is vulnerable to request smuggling due to incorrect parsing of chunk extensions

A flaw in Netty’s HTTP/1.1 chunked encoding parser allows newline LF characters in chunk extensions to be incorrectly treated as the end of the chunk-size line instead of requiring the proper CRLF sequence. This discrepancy can be exploited in rare cases where a reverse proxy interprets the same...