curl: Proxy CONNECT response poisoning via authentication retry in cf-h1-proxy.c (libcurl)

Summary: When an HTTP/1.x proxy returns a 407 with no Content-Length and no chunked transfer-encoding, lib/cf-h1-proxy.c singleheader sets ts-keepon = KEEPONDONE but never sets ts-closeconnection = TRUE. Because ts-closeconnection and conn-bits.close both stay false, the CONNECT tunnel state...

GHSA-RF5Q-VWXW-GMRF Bandit: Unauthenticated DoS via chunked request trailers in Bandit HTTP/1 decoder

Summary A worker-pinning denial of service in Bandit's HTTP/1 chunked transfer decoder. Any unauthenticated client that sends a Transfer-Encoding: chunked request whose body ends with a trailer field RFC 9112 §7.1.2 explicitly permits this causes the connection's worker process to spin forever in...

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...

WS-2019-0271

subtext in all versions is vulnerable to Denial of Service. This is caused by the fact that the package fails to enforce the maxBytes configuration for payloads with chunked encoding that are written to the file system. Which allows attackers to send requests with arbitrary payload sizes. This ma...

CVE-2026-39806 HTTP/1 chunked decoder infinite loop on requests with trailer fields in bandit

Loop with Unreachable Exit Condition 'Infinite Loop' vulnerability in mtrudel bandit allows unauthenticated remote denial of service via worker process exhaustion. 'Elixir.Bandit.HTTP1.Socket':doreadchunkeddata!/5 in lib/bandit/http1/socket.ex terminates only when the last-chunk line 0\r\n is...

CVE-2026-39806

Loop with Unreachable Exit Condition 'Infinite Loop' vulnerability in mtrudel bandit allows unauthenticated remote denial of service via worker process exhaustion. 'Elixir.Bandit.HTTP1.Socket':doreadchunkeddata!/5 in lib/bandit/http1/socket.ex terminates only when the last-chunk line 0\r\n is...

CVE-2026-39806

The CVE-2026-39806 issue affects Bandit (Elixir.Bandit.HTTP1.Socket) where do_read_chunked_data!/5 loops indefinitely when a chunked request includes trailer fields. The root cause is that RFC 9112 §7.1.2 allows trailers after the 0-length chunk, but the code exits only when the next line is imme...

CVE-2026-39806 HTTP/1 chunked decoder infinite loop on requests with trailer fields in bandit

Loop with Unreachable Exit Condition 'Infinite Loop' vulnerability in mtrudel bandit allows unauthenticated remote denial of service via worker process exhaustion. 'Elixir.Bandit.HTTP1.Socket':doreadchunkeddata!/5 in lib/bandit/http1/socket.ex terminates only when the last-chunk line 0\r\n is...

PT-2026-44975

Name of the Vulnerable Software and Affected Versions cpp-httplib versions prior to 0.43.4 Description A flaw in the ChunkedDecoder::read payload function of the cpp-httplib library allows a remote attacker to cause a denial of service. The issue occurs because the library uses std::strtoul to...

Linux Distros Unpatched Vulnerability : CVE-2026-7790

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Uncontrolled Resource Consumption vulnerability in ninenines cowlib cowhttpte module allows Excessive Allocation. The chunked transfer-encoding parser in...

GHSA-32P9-57CR-4X65 cowlib cow_http_te module: Uncontrolled Resource Consumption vulnerability allows Excessive Allocation

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...

CVE-2026-7790

CVE-2026-7790 : Uncontrolled resource consumption in ninenines cowlib (cow_http_te) allows CPU and memory DoS via HTTP/1.1 chunked transfer encoding. The chunk-size field accepts an unbounded number of hex digits, causing O(N^2) CPU work and O(N) memory for N digits; drip-fed input worsens this t...

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

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

Netty vulnerable to HTTP Request Smuggling due to incorrect chunk size parsing

Summary Netty's chunk size parser silently overflows int, enabling request smuggling attacks. Details io.netty.handler.codec.http.HttpObjectDecodergetChunkSize silently overflows int. The size is accumulated as follows: result = 16; result += digit; The result is checked only for negative values...

GHSA-M4CV-J2PX-7723 Netty vulnerable to HTTP Request Smuggling due to incorrect chunk size parsing

Summary Netty's chunk size parser silently overflows int, enabling request smuggling attacks. Details io.netty.handler.codec.http.HttpObjectDecodergetChunkSize silently overflows int. The size is accumulated as follows: result = 16; result += digit; The result is checked only for negative values...

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...

CVE-2026-40562

Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Gazelle incorrectly prioritizes "Content-Length" over "Transfer-Encoding: chunked" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must take precedence. An...

PT-2026-38373

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.2.13.Final Netty versions prior to 4.1.133.Final Description Netty's chunk size parser silently overflows an integer, which allows for request smuggling attacks. This occurs within the getChunkSize function of the...