CVE-2026-77803

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, front-end request desynchronization is possible in the proxy request forwarding component. A request that contains both a Content-Length and a Transfer-Encoding header is forwarded with both headers present,...

CVE-2026-77802

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, HTTP request smuggling is possible in the proxy request forwarding component. Requests containing multiple Content-Length headers with conflicting values are forwarded verbatim to the origin server, while...

CVE-2026-77803 Front-end Desynchronization Vulnerability in Progress® Telerik® Fiddler® Classic

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, front-end request desynchronization is possible in the proxy request forwarding component. A request that contains both a Content-Length and a Transfer-Encoding header is forwarded with both headers present,...

CVE-2026-77802

Progress Telerik Fiddler Classic for Windows versions prior to v6.0.20262.10021 are vulnerable to HTTP request smuggling in the proxy request forwarding component. The issue arises because the software forwards requests with multiple conflicting Content-Length headers verbatim, while only using t...

EUVD-2026-92425

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, HTTP request smuggling is possible in the proxy request forwarding component. Requests containing multiple Content-Length headers with conflicting values are forwarded verbatim to the origin server, while...

CVE-2026-77802 HTTP Request Smuggling Vulnerability in Progress® Telerik® Fiddler® Classic

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, HTTP request smuggling is possible in the proxy request forwarding component. Requests containing multiple Content-Length headers with conflicting values are forwarded verbatim to the origin server, while...

CVE-2026-77802 HTTP Request Smuggling Vulnerability in Progress® Telerik® Fiddler® Classic

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, HTTP request smuggling is possible in the proxy request forwarding component. Requests containing multiple Content-Length headers with conflicting values are forwarded verbatim to the origin server, while...

Astra Linux – Vulnerability in Waitress

Waitress version 1.3.1 allows for the smuggling of requests by sending the Content-Length header twice. Waitress would fold the two Content-Length headers together, and since it cannot convert the now comma-separated values into integers, it internally sets the Content-Length to 0. If two...

Astra Linux – Vulnerability in PHP 8.1

In PHP versions 8.1. before 8.1.31, 8.2. before 8.2.26, and 8.3. before 8.3.14, when using streams with a configured proxy and the “requestfulluri” option, the URI is not properly sanitized. This can lead to HTTP request smuggling, allowing attackers to use the proxy to send arbitrary HTTP reques...

Astra Linux – Vulnerability in JRuby

A vulnerability was discovered in Ruby versions 2.5.8, 2.6.x up to 2.6.6, and 2.7.x up to 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, did not rigorously check the transfer-encoding header value. An attacker could potentially exploit this vulnerability to bypass a reverse proxy which...

CVE-2026-77802: Inconsistent Interpretation of HTTP Requests

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, HTTP request smuggling is possible in the proxy request forwarding component. Requests containing multiple Content-Length headers with conflicting values are forwarded verbatim to the origin server, while...

PT-2026-105987

Name of the Vulnerable Software and Affected Versions Progress Telerik Fiddler Classic for Windows versions prior to 6.0.20262.10021 Description HTTP request smuggling is possible in the proxy request forwarding component. This occurs when requests containing multiple Content-Length headers with...

Security Bulletin: IBM SPSS Analytic Server is affected by multiple vulnerabilities in IBM WebSphere Application Server Liberty

Summary IBM SPSS Analytic Server is affected by multiple vulnerabilities in IBM WebSphere Application Server Liberty. This has been addressed in the remediation section. Vulnerability Details CVEID:CVE-2026-65432 DESCRIPTION: Apache CXF reads a top-level WSDL through its hardened StaxUtils path,...

Security Bulletin: Due to the use of HTTP/1.1 with Jetty server, IBM Sterling Control Center is vulnerable to Inconsistent Interpretation of HTTP Requests (CVE-2026-19203)

Summary HTTP/1.1 with Jetty server is used by IBM Sterling Control Center as part of dependency in jetty-http-12.0.25.jar. Vulnerability Details CVEID:CVE-2026-19203 DESCRIPTION: A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary...

NetScaler 73.30 HTTP Request Smuggling

NetScaler version 73.30 contains an HTTP/1.1 chunk-size accumulator overflow that can cause request parsing desynchronization and request smuggling...

Security Bulletin: Vulnerability in aiohttp bundled with IBM Fusion, IBM Fusion HCI, and IBM Fusion Content-Aware Storage.

Summary IBM Fusion, IBM Fusion HCI, and IBM Fusion Content-Aware Storage include the aiohttp library, which is affected by multiple vulnerabilities, including HTTP request smuggling and out-of-bounds read vulnerabilities. CVE-2026-69243, CVE-2026-69244. Vulnerability Details CVEID:CVE-2026-69243...

SUSE SLED15 / SLES15 Security Update : python-tornado6 (SUSE-SU-2026:4403-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4403-1 advisory. - CVE-2023-54397: Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsin...

SUSE SLED15 / SLES15 Security Update : python-tornado (SUSE-SU-2026:4404-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4404-1 advisory. - CVE-2023-54397: Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsin...

CVE-2026-66357

A flaw was found in the inets component of Erlang/OTP, specifically within its httpd server. This vulnerability arises from the httpd server's failure to correctly implement obs-fold obsolete line folding for HTTP header continuation lines, as defined in RFC 2616 and RFC 7230. This oversight allo...

PYSEC-2026-4162 sanic chunked trailer request smuggling allows hidden second request execution

Description Sanic's HTTP/1.1 chunked-body handling does not fully consume the trailer-part after the terminating 0\r\n chunk. Because of that, attacker-controlled bytes left in the connection buffer after the first chunked request can be interpreted as the start of a new HTTP request on the same...