CVE-2020-28018

POC CVE-2020-28018 Introduction The Qualys team has discovered and published 21 critical vulnerabilities in the Exim4 mail server. https://blog.qualys.com/vulnerabilities-research/2021/05/04/21nails-multiple-vulnerabilities-in-exim-mail-server The following link provides detailed technical...

PT-2026-82358

The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier...

Astra Linux – Vulnerability in Waitress

In Waitress version 1.4.0, if a proxy server is used in front of Waitress, an attacker may send an invalid request that bypasses the front-end and is parsed differently by Waitress. This could lead to HTTP request smuggling. Specifically, requests containing special whitespace characters in the...

netty: io.netty/netty-codec-http: Netty: Incorrect HTTP response parsing leads to data confusion

A flaw was found in Netty, an asynchronous, event-driven network application framework. A remote attacker could exploit this vulnerability by sending a specific sequence of HTTP responses 103, followed by a 200 with a GET body, then another 200 for a HEAD request when the client pipelines GET the...

netty: io.netty/netty-codec-http: Netty: Incorrect HTTP response parsing leads to data confusion

A flaw was found in Netty, an asynchronous, event-driven network application framework. A remote attacker could exploit this vulnerability by sending a specific sequence of HTTP responses 103, followed by a 200 with a GET body, then another 200 for a HEAD request when the client pipelines GET the...

CVE-2026-59899

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controll...

EUVD-2026-50443

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controll...

CVE-2026-59899 Netty HttpContentEncoder: Unbounded Per-Connection Queue Growth via HTTP/1.1 Pipelining Leads to Denial of Service

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controll...

CVE-2026-59899 Netty HttpContentEncoder: Unbounded Per-Connection Queue Growth via HTTP/1.1 Pipelining Leads to Denial of Service

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controll...

CVE-2026-59899

CVE-2026-59899 in Netty affects the HttpContentEncoder (superclass of HttpContentCompressor) before 4.1.136.Final and 4.2.16.Final. A per-channel ArrayDeque named acceptEncodingQueue accumulates attacker-controlled data with no size limit, filled on the I/O thread for every inbound HTTP request a...

CVE-2026-59899 Netty HttpContentEncoder: Unbounded Per-Connection Queue Growth via HTTP/1.1 Pipelining Leads to Denial of Service

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controll...

CVE-2026-59899

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controll...

Linux Distros Unpatched Vulnerability : CVE-2026-59899

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder the superclass of the...

Uncontrolled Resource Consumption (Denial Of Service)

io.netty, netty-codec-http is vulnerable to Uncontrolled Resource Consumption Denial of Service. The vulnerability is due to the HttpContentEncoder maintaining an unbounded acceptEncodingQueue that stores attacker-controlled data without any size limit, which allows an attacker to exploit HTTP/1....

Security update for python-aiohttp

This update for python-aiohttp fixes the following issues: CVE-2026-50269: improper validation of user-controlled strings allows for CRLF injection in multipart headers bsc1268398. CVE-2026-54273: no limit in the HTTP/1 pipelined request queue can lead to excessive resource consumption bsc1268543...

Security update for python-aiohttp

This update for python-aiohttp fixes the following issues CVE-2026-22815: insufficient restrictions in header/trailer handling can cause uncapped memory usage and a denial of service bsc1261320. CVE-2026-34513: unbounded DNS cache can cause a excessive memory usage and lead to a denial of service...

Netty: [HttpContentEncoder] Unbounded Per-Connection Queue Growth via HTTP/1.1 Pipelining Leads to Denial of Service

Impact HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controlled data without any size limit. The queue is filled on the I/O thread for every inbound HTTP request and drained...

PT-2026-63547

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.136.Final Netty versions prior to 4.2.16.Final Description HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that...

CVE-2026-16317 Silent Drop of TLS 1.3 Encrypted Records in s2n-tls

Missing validation of the outer contenttype byte on TLS 1.3 encrypted records in s2n-tls allows an active man-in-the-middle to silently discard individual application data records without either endpoint detecting the modification. RFC 8446 Section 5.2 requires that the outer contenttype of all...

CVE-2026-16317

The flaw affects s2n-tls (TLS 1.3) where the outer content_type byte is not covered by the AEAD tag because it is hardcoded in AAD instead of using the wire byte. This allows an active MITM to silently discard individual application_data records without detection, enabling selective suppression o...