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...

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...

ai.catboost:catboost-spark_4.0_2.13 (1.2.10), ai.catboost:catboost-spark_4.1_2.13 (1.2.10) +6978 more potentially affected by CVE-2026-44249 via io.netty:netty-handler (>=4.2.0.final, <=4.2.14.final)

io.netty:netty-handler MAVEN version =4.2.0.final, =0.4.0, =0.4.0, =1.0.0-beta, =0.6.4, =0.6.4, =0.6.4, =0.1.0, =0.1.0, =1.0.0, =1.0.0, =4.13.5, =4.13.5, =4.14.0-rc.2 and more Source cves: CVE-2026-44249 Source advisory: SNYK:JAVA-IONETTY-17254120...

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...

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...

ai.catboost:catboost-spark_4.0_2.13 (1.2.10), ai.catboost:catboost-spark_4.1_2.13 (1.2.10) +6978 more potentially affected by CVE-2026-44249 via io.netty:netty-handler (>=4.2.0.final, <=4.2.14.final)

io.netty:netty-handler MAVEN version =4.2.0.final, =0.4.0, =0.4.0, =1.0.0-beta, =0.6.4, =0.6.4, =0.6.4, =0.1.0, =0.1.0, =1.0.0, =1.0.0, =4.13.5, =4.13.5, =4.14.0-rc.2 and more Source cves: CVE-2026-44249 Source advisory: GHSA-3QP7-7MW8-WX86...

ai.catboost:catboost-spark_4.0_2.13 (1.2.10), ai.catboost:catboost-spark_4.1_2.13 (1.2.10) +6978 more potentially affected by CVE-2026-44249 via io.netty:netty-handler (>=4.2.0.final, <=4.2.14.final)

io.netty:netty-handler MAVEN version =4.2.0.final, =0.4.0, =0.4.0, =1.0.0-beta, =0.6.4, =0.6.4, =0.6.4, =0.1.0, =0.1.0, =1.0.0, =1.0.0, =4.13.5, =4.13.5, =4.14.0-rc.2 and more Source cves: CVE-2026-44249 Source advisory: OSV:GHSA-3QP7-7MW8-WX86...

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,...

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...

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-2026-47554

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-2026-47589

Summary Netty's DNS resolver uses a predictable PRNG for generating DNS transaction IDs and defaults to a static UDP source port. This combination reduces the entropy of DNS queries, enabling DNS Cache Poisoning Kaminsky attack. Details Two factors contribute to this vulnerability in...

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-2026-48916

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 HTTP/2 max header size handling allows for an attack similar to HTTP/2 Rapid Reset. When a client sends the SETTINGS MAX HEADER LIST SIZE setting, the...

cve-2026-41715 - MEDIUM - Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect

cve-2026-41715 - MEDIUM - Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect...

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-2026-47551

Summary Netty's DnsResolveContext insufficiently validates the bailiwick of NS records, enabling DNS Cache Poisoning. An attacker controlling an authoritative name server for a subdomain can poison the cache for parent domains like .co.uk. Details In...

PT-2026-47603

Name of the Vulnerable Software and Affected Versions Netty affected versions not specified Description The default configuration of the Http3ConnectionHandler in the Netty HTTP/3 codec does not enforce a maximum header size limit. When a peer does not specify HTTP3 SETTINGS MAX FIELD SECTION SIZ...