Ubuntu 24.04 LTS : Netty vulnerability (USN-8742-1)

The remote Ubuntu 24.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-8742-1 advisory. It was discovered that Netty incorrectly validates the bailiwick of NS records. An attacker could possibly use this issue to facilitate DNS cache poisoning attack...

Denial Of Service (DoS)

Netty is vulnerable to Denial of Service DoS. The vulnerability is due to inefficient quadratic CPU processing when aggregating large TLS ClientHello messages split across many small records, which allows an unauthenticated remote attacker to consume excessive CPU resources and degrade TLS handli...

Improper Authorization

Netty is vulnerable to Improper Authentication. The vulnerability is due to incorrect offset validation when processing fragmented TLS ClientHello handshake headers, which allows an unauthenticated remote attacker to bypass SNI-specific mutual TLS authentication when no additional certificate...

CLEANSTART-2026-GH96150 Netty (io

Multiple security vulnerabilities affect the apache-zookeeper package. Netty io. See references for individual vulnerability details...

GHSA-C4C3-7FPV-J4Q5 Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext

Summary A fragmented TLS ClientHello whose handshake header spans multiple records makes Netty silently fall back to the default SslContext; where per-SNI selection is the sole mTLS gate, an unauthenticated attacker can bypass the route's mTLS requirement. Details In...

EUVD-2026-63095

Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext...

Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext

Summary A fragmented TLS ClientHello whose handshake header spans multiple records makes Netty silently fall back to the default SslContext; where per-SNI selection is the sole mTLS gate, an unauthenticated attacker can bypass the route's mTLS requirement. Details In...

Inefficient Algorithmic Complexity

Overview io.netty:netty-handler is a library that provides an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which...

GHSA-FCCG-MWVH-QQG4 Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing

Summary Netty's default SNI entrypoint reparses and recopies previously received ClientHello fragments on every additional TLS handshake record. A remote peer can send a small first record that advertises a large ClientHello length and then drip the body in many tiny records, causing superlinear...

EUVD-2026-63092

Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing...

Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing

Summary Netty's default SNI entrypoint reparses and recopies previously received ClientHello fragments on every additional TLS handshake record. A remote peer can send a small first record that advertises a large ClientHello length and then drip the body in many tiny records, causing superlinear...

CLEANSTART-2026-SU61748 Netty is an asynchronous, event-driven network application framework

Multiple security vulnerabilities affect the solr package. Netty is an asynchronous, event-driven network application framework. See references for individual vulnerability details...

ROS-20260908-73-0052

The vulnerability in Netty is related to insufficient validation of data authenticity. Exploiting this vulnerability allows a remote attacker to execute arbitrary code...

Denial-of-service (DoS)

io.projectreactor.netty, reactor-netty-http is vulnerable to a denial-of-service DoS. The vulnerability is due to improper handling of multiple pipelined HTTP/1.1 requests over a single connection, which allows an attacker to send specially crafted requests that consume excessive memory and...

DoS (Denial of Service) io.netty:netty-codec Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.0, 9.4.0, 9.5.0, 9.6.0, 10.0.0, 10.1.1, 10.2.0, and 10.3.0 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of...

DoS (Denial of Service) io.netty:netty-handler Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.0, 9.4.0, 9.5.0, 9.6.0, 10.0.0, 10.1.1, 10.2.0, and 10.3.0 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of...

Improper Authorization io.netty:netty-handler Dependency in Bitbucket Data Center

This High severity Improper Authorization vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.0, 9.4.0, 9.5.0, 9.6.0, 10.0.0, 10.1.1, 10.2.0, and 10.3.0 of Bitbucket Data Center. This Improper Authorization vulnerability, with a CVSS Score of 8.1 and a CVSS Vector of...

BASM (Broken Authentication & Session Management) Netty Dependency in Bitbucket Data Center and Server

This High severity BASM Broken Authentication & Session Management vulnerability known as CVE-2026-50010 was introduced in 9.0.1 and later of Bitbucket Data Center and Server. This BASM Broken Authentication & Session Management vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of...

Improper Credential Management

Reactor Netty is vulnerable to Improper Credential Management. The vulnerability is due to credentials being forwarded during WebSocket handshake redirects to a different origin when redirects are explicitly enabled, which allows an attacker to intercept or obtain sensitive credentials...

Security Bulletin: IBM Enterprise Build of Quarkus is affected by multiple vulnerabilities

Summary IBM Enterprise Build of Quarkus is affected by vulnerabilities in Proton-J, MongoDB Client, Apache HTTP Client and Netty Vulnerability Details CVEID:CVE-2026-59903 DESCRIPTION: Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final,...