CVE-2026-7790 Unbounded chunk-size hex digits in cowlib cause quadratic CPU and memory DoS

Uncontrolled Resource Consumption vulnerability in ninenines cowlib cowhttpte module allows Excessive Allocation. The chunked transfer-encoding parser in cowhttpte accepts an unbounded number of hex digits in the chunk-size field. Each digit causes a bignum multiplication Len 16 + digit, so parsi...

CVE-2026-7790 Unbounded chunk-size hex digits in cowlib cause quadratic CPU and memory DoS

Uncontrolled Resource Consumption vulnerability in ninenines cowlib cowhttpte module allows Excessive Allocation. The chunked transfer-encoding parser in cowhttpte accepts an unbounded number of hex digits in the chunk-size field. Each digit causes a bignum multiplication Len 16 + digit, so parsi...

HTTP Request Smuggling

Overview io.netty:netty-codec-http is a network application framework for rapid development of maintainable high performance protocol servers & clients. Affected versions of this package are vulnerable to HTTP Request Smuggling via the getChunkSize function. An attacker can inject unauthorized HT...

io.netty/netty-codec-http: Netty: Request smuggling via incorrect parsing of HTTP/1.1 chunked transfer encoding extension values

A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTTP/1.1 chunked transfer encoding extension values. Due to incorrect parsing of quoted strings, this flaw enables request smuggling attacks, potentially allowing an attacker to bypass...

io.netty/netty-codec-http: Netty: Request smuggling via incorrect parsing of HTTP/1.1 chunked transfer encoding extension values

A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTTP/1.1 chunked transfer encoding extension values. Due to incorrect parsing of quoted strings, this flaw enables request smuggling attacks, potentially allowing an attacker to bypass...

UBUNTU-CVE-2026-31842

Tinyproxy through 1.11.3 is vulnerable to HTTP request parsing desynchronization due to a case-sensitive comparison of the Transfer-Encoding header in src/reqs.c. The ischunkedtransfer function uses strcmp to compare the header value against "chunked", even though RFC 7230 specifies that...

PT-2026-30811

Name of the Vulnerable Software and Affected Versions Tinyproxy versions 1.0 through 1.11.3 Description An issue exists in the way the Transfer-Encoding header is parsed in src/reqs.c. The is chunked transfer function uses strcmp to compare the header value against "chunked", failing to account f...

Rack's multipart parsing without Content-Length header allows unbounded chunked file uploads

Summary Rack::Multipart::Parser only wraps the request body in a BoundedIO when CONTENTLENGTH is present. When a multipart/form-data request is sent without a Content-Length header, such as with HTTP chunked transfer encoding, multipart parsing continues until end-of-stream with no total size...

UBUNTU-CVE-2026-3945

An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service DoS. The issue occurs because chunk size values are parsed using strtol without properly validating...

CVE-2026-3945 tinyproxy Integer Overflow in HTTP Chunked Transfer-Encoding Parser Leading to Denial of Service

An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service DoS. The issue occurs because chunk size values are parsed using strtol without properly validating...

CVE-2026-3945

An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service DoS. The issue occurs because chunk size values are parsed using strtol without properly validating...

CVE-2026-33870

Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fi...

GHSA-PWQR-WMGM-9RR8 Netty: HTTP Request Smuggling via Chunked Extension Quoted-String Parsing

Summary Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Background This vulnerability is a new variant discovered during research into the "Funky Chunks" HTTP request smuggling techniques: - - The original researc...

HTTP Request Smuggling

Next.js is vulnerable to HTTP Request Smuggling. The vulnerability is due to improper handling of Transfer-Encoding: chunked and Content-Length headers during proxy rewrites, which allows an attacker to craft malicious DELETE/OPTIONS requests and smuggle unauthorized requests to unintended backen...

Next.js Framework 9.5.x < 15.5.3 / 16.x < 16.1.7 HTTP Request Smuggling (GHSA-ggv3-7p47-pfv8)

The Next.js Framework on the remote host is affected by an HTTP request smuggling vulnerability: - A vulnerability exists in Next.js proxy rewrites where a crafted DELETE/OPTIONS request using Transfer-Encoding: chunked could trigger request boundary disagreement between the proxy and backend. An...

CVE-2026-29057 Next.js: HTTP request smuggling in rewrites

Next.js is a React framework for building full-stack web applications. Starting in version 9.5.0 and prior to versions 15.5.13 and 16.1.7, when Next.js rewrites proxy traffic to an external backend, a crafted DELETE/OPTIONS request using Transfer-Encoding: chunked could trigger request boundary...

Linux Distros Unpatched Vulnerability : CVE-2026-29057

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Next.js is a React framework for building full-stack web applications. Starting in version 9.5.0 and prior to versions 15.5.13 and 16.1.7, when Next.js rewrites...

PT-2026-26175

Summary ewe's chunked transfer encoding trailer handling merges declared trailer fields into req.headers after body parsing, but the denylist only blocks 9 header names. Security-sensitive headers like authorization, cookie, and x-forwarded-for can be injected or overwritten by a malicious client...

AZL-79800 CVE-2026-32240 affecting package capnproto 1.0.1-4

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...

EUVD-2026-11688

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...