curl: HTTP/1.1 Response Desynchronization via conflicting CL/TE headers in Proxy CONNECT

Summary: curl fails to prioritize the Transfer-Encoding: chunked header over Content-Length in HTTP/1.1 proxy responses specifically 407/401 auth challenges, violating RFC 9112 Section 6.1. I have identified the root cause in cf-h1-proxy.c. In the response-handling loop around line 466, the code...

CVE-2026-32881 ewe has an Overly Permissive List of Allowed Inputs

ewe is a Gleam web server. ewe is a Gleam web server. Versions 0.6.0 through 3.0.4 are vulnerable to authentication bypass or spoofed proxy-trust headers. Chunked transfer encoding trailer handling merges declared trailer fields into req.headers after body parsing, but the denylist only blocks 9...

CVE-2026-29057

A request smuggling flaw has been discovered in Next.js. when Next.js rewrites proxy traffic to an external backend, a crafted DELETE/OPTIONS request using Transfer-Encoding: chunked could trigger request boundary disagreement between the proxy and backend. This could allow request smuggling...

OPENSUSE-SU-2026:20384-1 Security update for libsoup

This update for libsoup fixes the following issues: Update to libsoup 3.6.6: - CVE-2025-12105: heap use-after-free in message queue handling during HTTP/2 read completion bsc1252555. - CVE-2025-14523: Duplicate Host Header Handling Causes Host-Parsing Discrepancy bsc1254876. - CVE-2025-32049:...

GHSA-GGV3-7P47-PFV8 Next.js: HTTP request smuggling in rewrites

Summary When Next.js rewrites proxy traffic to an external backend, a crafted DELETE/OPTIONS request using Transfer-Encoding: chunked could trigger request boundary disagreement between the proxy and backend. This could allow request smuggling through rewritten routes. Impact An attacker could...

GHSA-4W98-XF39-23GP Loop with Unreachable Exit Condition ('Infinite Loop') in ewe

Summary ewe's handletrailers function contains a bug where rejected trailer headers forbidden or undeclared cause an infinite loop. The function recurses with the original unparsed buffer instead of advancing past the rejected header, re-parsing the same header forever. Each malicious request...

Loop with Unreachable Exit Condition ('Infinite Loop') in ewe

Summary ewe's handletrailers function contains a bug where rejected trailer headers forbidden or undeclared cause an infinite loop. The function recurses with the original unparsed buffer instead of advancing past the rejected header, re-parsing the same header forever. Each malicious request...

SUSE CVE-2026-32240

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, when using Transfer-Encoding: chunked, if a chunk's size parsed to a value of 2^64 or larger, it would be truncated to a 64-bit integer. In theory, this bug could enable HTTP request/response smuggling. This...

DEBIAN-CVE-2026-32240

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, when using Transfer-Encoding: chunked, if a chunk's size parsed to a value of 2^64 or larger, it would be truncated to a 64-bit integer. In theory, this bug could enable HTTP request/response smuggling. This...

PT-2026-25069

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, when using Transfer-Encoding: chunked, if a chunk's size parsed to a value of 2^64 or larger, it would be truncated to a 64-bit integer. In theory, this bug could enable HTTP request/response smuggling. This...

capnproto 环境问题漏洞

Capnproto is an open-source Proto serialization/RPC system—including core tools and C++ libraries. Versions of Capnproto prior to 1.4.0 contained environmental vulnerabilities. These vulnerabilities stemmed from the use of chunked transmission encoding, where the block size parsing values were...

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...

DEBIAN-CVE-2026-1801

A flaw was found in libsoup, an HTTP client/server library. This HTTP Request Smuggling vulnerability arises from non-RFC-compliant parsing in the soupfilterinputstreamreadline logic, where libsoup accepts malformed chunk headers, such as lone line feed LF characters instead of the required...

UBUNTU-CVE-2026-1801

A flaw was found in libsoup, an HTTP client/server library. This HTTP Request Smuggling vulnerability arises from non-RFC-compliant parsing in the soupfilterinputstreamreadline logic, where libsoup accepts malformed chunk headers, such as lone line feed LF characters instead of the required...

CVE-2026-1760 Libsoup: soupserver: denial of service via http request smuggling

A flaw was found in SoupServer. This HTTP request smuggling vulnerability occurs because SoupServer improperly handles requests that combine Transfer-Encoding: chunked and Connection: keep-alive headers. A remote, unauthenticated client can exploit this by sending specially crafted requests,...

CLEANSTART-2026-PG91940 net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines

Multiple security vulnerabilities affect the harbor-registry package. The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. See references for individual vulnerability details...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: weldr-client (UTSA-2026-005216)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005216 advisory. The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is us...

CVE-2019-16239

processhttpresponse in OpenConnect before 8.05 has a Buffer Overflow when a malicious server uses HTTP chunked encoding with crafted chunk sizes...

PT-2026-28803

Name of the Vulnerable Software and Affected Versions tinyproxy versions up to and including 1.11.3 Description An integer overflow in the HTTP chunked transfer encoding parser can lead to a denial of service DoS. The issue arises because chunk size values are parsed without proper overflow...

CVE-2025-66373

Akamai Ghost on Akamai CDN edge servers before 2025-11-17 has a chunked request body processing error that can result in HTTP request smuggling. When Akamai Ghost receives an invalid chunked body that includes a chunk size different from the actual size of the following chunk data, under certain...