Netty has Unbounded Direct Memory Consumption in its RedisDecoder

Summary An attacker can cause DoS by sending crafted Redis payloads across multiple connections without \r\n. This exhausts the server's direct memory pool OutOfDirectMemoryError, preventing legitimate connections from being processed. Details io.netty.handler.codec.redis.RedisDecoder decodes the...

Denial of Service (DoS)

Overview Affected versions of this package are vulnerable to Denial of Service DoS in the RedisArrayAggregator function. An attacker can exhaust system memory by sending specially crafted Redis payloads containing deeply nested arrays, resulting in allocation of excessive state objects and...

Netty: Memory Exhaustion in RedisArrayAggregator due to Deeply Nested Arrays

Summary An attacker can cause DoS by sending a crafted Redis payload with deeply nested arrays. This forces the server to allocate a massive number of state objects and collections, leading to memory exhaustion and an OutOfMemoryError. Details io.netty.handler.codec.redis.RedisArrayAggregator...

GHSA-3244-J874-RHC2 Netty: Memory Exhaustion in RedisArrayAggregator due to Deeply Nested Arrays

Summary An attacker can cause DoS by sending a crafted Redis payload with deeply nested arrays. This forces the server to allocate a massive number of state objects and collections, leading to memory exhaustion and an OutOfMemoryError. Details io.netty.handler.codec.redis.RedisArrayAggregator...

Incorrect Comparison

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...

Netty has an IPv6 Subnet Filter Bypass via Incorrect Comparator Masking

Summary An attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo. Valid public IP addresses can bypass the restrictions. Details io.netty.handler.ipfilter.IpSubnetFilterRulecompareTojava.net.InetSocketAddress method performs a bitwise AND...

Security Bulletin: IBM Datapower Operations Dashboard is vulnerable to HTTP Request Smuggling CVE-2025-58056

Summary Netty is used by the IBM Datapower Operations Dashboard as part of their server implementation Vulnerability Details CVEID:CVE-2025-58056 DESCRIPTION: Netty is an asynchronous event-driven network application framework for development of maintainable high performance protocol servers and...

USN-8401-1: Netty vulnerabilities

It was discovered that Netty's HTTP proxy handler did not properly validate headers when constructing CONNECT requests. An attacker could possibly use this issue to inject arbitrary HTTP headers into CONNECT requests. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS,...

USN-8401-1 netty vulnerabilities

It was discovered that Netty's HTTP proxy handler did not properly validate headers when constructing CONNECT requests. An attacker could possibly use this issue to inject arbitrary HTTP headers into CONNECT requests. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS,...

Cleartext Transmission of Sensitive Information

Overview Affected versions of this package are vulnerable to Cleartext Transmission of Sensitive Information via HTTP redirect handling in the HTTP client. An attacker can obtain sensitive credentials by causing a client configured to automatically follow redirects to follow a redirect from a...

PT-2026-47602

Name of the Vulnerable Software and Affected Versions Netty affected versions not specified Description A Denial of Service DoS issue exists where an attacker can exhaust the server's direct memory pool, leading to an OutOfDirectMemoryError and preventing legitimate connections. This occurs becau...

PT-2026-47610

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.135.Final Netty versions prior to 4.2.15.Final Description Netty's DnsResolveContext fails to validate the origin bailiwick of CNAME records in DNS responses. In the buildAliasMap function within...

PT-2026-47612

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.135.Final Netty versions prior to 4.2.15.Final Description In the network application framework, DefaultHttp2Connection.DefaultEndpoint initializes maxActiveStreams and maxStreams to Integer.MAX VALUE, while...

PT-2026-47614

Name of the Vulnerable Software and Affected Versions Netty ionetty:netty-resolver-dns affected versions not specified Description Insufficient validation of the bailiwick of NS records in DnsResolveContext allows for DNS Cache Poisoning. An attacker controlling an authoritative name server for a...

PT-2026-47555

Summary An attacker can cause DoS by sending crafted Redis payloads across multiple connections without r . This exhausts the server's direct memory pool OutOfDirectMemoryError, preventing legitimate connections from being processed. Details io.netty.handler.codec.redis.RedisDecoder decodes the...

PT-2026-47554

Summary Netty's DnsResolveContext fails to validate the origin bailiwick of CNAME records in DNS responses. Details In io.netty.resolver.dns.DnsResolveContextbuildAliasMap, the resolver processes the ANSWER section of a DNS response and blindly caches all CNAME records it finds. According to...

PT-2026-47563

Summary The default configuration of the Http3ConnectionHandler in the Netty HTTP/3 codec lacks an enforced maximum header size limit. When a peer does not explicitly specify HTTP3 SETTINGS MAX FIELD SECTION SIZE, the implementation defaults to an unbounded limit. This insecure default...

PT-2026-47601

Name of the Vulnerable Software and Affected Versions netty-codec-redis versions prior to 4.1.135.Final netty-codec-redis versions prior to 4.2.15.Final Description A denial of service can occur when an attacker sends a crafted Redis payload containing deeply nested arrays. The...

PT-2026-47609

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.135.Final Netty versions prior to 4.2.15.Final Description The DNS resolver in the io.netty.resolver.dns module uses a predictable Pseudo-Random Number Generator PRNG for generating DNS transaction IDs and defaults ...

PT-2026-47543

Summary An attacker can cause DoS by sending a crafted Redis payload with deeply nested arrays. This forces the server to allocate a massive number of state objects and collections, leading to memory exhaustion and an OutOfMemoryError. Details io.netty.handler.codec.redis.RedisArrayAggregator...